diff -r 000000000000 -r 6474c204b198 security/sandbox/chromium/base/bind_internal.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/sandbox/chromium/base/bind_internal.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,2789 @@
+// This file was GENERATED by command:
+//     pump.py bind_internal.h.pump
+// DO NOT EDIT BY HAND!!!
+
+
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_BIND_INTERNAL_H_
+#define BASE_BIND_INTERNAL_H_
+
+#include "base/bind_helpers.h"
+#include "base/callback_internal.h"
+#include "base/memory/raw_scoped_refptr_mismatch_checker.h"
+#include "base/memory/weak_ptr.h"
+#include "base/template_util.h"
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#include "base/bind_internal_win.h"
+#endif
+
+namespace base {
+namespace internal {
+
+// See base/callback.h for user documentation.
+//
+//
+// CONCEPTS:
+//  Runnable -- A type (really a type class) that has a single Run() method
+//              and a RunType typedef that corresponds to the type of Run().
+//              A Runnable can declare that it should treated like a method
+//              call by including a typedef named IsMethod.  The value of
+//              this typedef is NOT inspected, only the existence.  When a
+//              Runnable declares itself a method, Bind() will enforce special
+//              refcounting + WeakPtr handling semantics for the first
+//              parameter which is expected to be an object.
+//  Functor -- A copyable type representing something that should be called.
+//             All function pointers, Callback<>, and Runnables are functors
+//             even if the invocation syntax differs.
+//  RunType -- A function type (as opposed to function _pointer_ type) for
+//             a Run() function.  Usually just a convenience typedef.
+//  (Bound)ArgsType -- A function type that is being (ab)used to store the
+//                     types of set of arguments.  The "return" type is always
+//                     void here.  We use this hack so that we do not need
+//                     a new type name for each arity of type. (eg.,
+//                     BindState1, BindState2).  This makes forward
+//                     declarations and friending much much easier.
+//
+// Types:
+//  RunnableAdapter<> -- Wraps the various "function" pointer types into an
+//                       object that adheres to the Runnable interface.
+//                       There are |3*ARITY| RunnableAdapter types.
+//  FunctionTraits<> -- Type traits that unwrap a function signature into a
+//                      a set of easier to use typedefs.  Used mainly for
+//                      compile time asserts.
+//                      There are |ARITY| FunctionTraits types.
+//  ForceVoidReturn<> -- Helper class for translating function signatures to
+//                       equivalent forms with a "void" return type.
+//                    There are |ARITY| ForceVoidReturn types.
+//  FunctorTraits<> -- Type traits used determine the correct RunType and
+//                     RunnableType for a Functor.  This is where function
+//                     signature adapters are applied.
+//                    There are |ARITY| ForceVoidReturn types.
+//  MakeRunnable<> -- Takes a Functor and returns an object in the Runnable
+//                    type class that represents the underlying Functor.
+//                    There are |O(1)| MakeRunnable types.
+//  InvokeHelper<> -- Take a Runnable + arguments and actully invokes it.
+// Handle the differing syntaxes needed for WeakPtr<> support,
+//                    and for ignoring return values.  This is separate from
+//                    Invoker to avoid creating multiple version of Invoker<>
+//                    which grows at O(n^2) with the arity.
+//                    There are |k*ARITY| InvokeHelper types.
+//  Invoker<> -- Unwraps the curried parameters and executes the Runnable.
+//               There are |(ARITY^2 + ARITY)/2| Invoketypes.
+//  BindState<> -- Stores the curried parameters, and is the main entry point
+//                 into the Bind() system, doing most of the type resolution.
+//                 There are ARITY BindState types.
+
+// RunnableAdapter<>
+//
+// The RunnableAdapter<> templates provide a uniform interface for invoking
+// a function pointer, method pointer, or const method pointer. The adapter
+// exposes a Run() method with an appropriate signature. Using this wrapper
+// allows for writing code that supports all three pointer types without
+// undue repetition.  Without it, a lot of code would need to be repeated 3
+// times.
+//
+// For method pointers and const method pointers the first argument to Run()
+// is considered to be the received of the method.  This is similar to STL's
+// mem_fun().
+//
+// This class also exposes a RunType typedef that is the function type of the
+// Run() function.
+//
+// If and only if the wrapper contains a method or const method pointer, an
+// IsMethod typedef is exposed.  The existence of this typedef (NOT the value)
+// marks that the wrapper should be considered a method wrapper.
+
+template <typename Functor>
+class RunnableAdapter;
+
+// Function: Arity 0.
+template <typename R>
+class RunnableAdapter<R(*)()> {
+ public:
+  typedef R (RunType)();
+
+  explicit RunnableAdapter(R(*function)())
+      : function_(function) {
+  }
+
+  R Run() {
+    return function_();
+  }
+
+ private:
+  R (*function_)();
+};
+
+// Method: Arity 0.
+template <typename R, typename T>
+class RunnableAdapter<R(T::*)()> {
+ public:
+  typedef R (RunType)(T*);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)())
+      : method_(method) {
+  }
+
+  R Run(T* object) {
+    return (object->*method_)();
+  }
+
+ private:
+  R (T::*method_)();
+};
+
+// Const Method: Arity 0.
+template <typename R, typename T>
+class RunnableAdapter<R(T::*)() const> {
+ public:
+  typedef R (RunType)(const T*);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)() const)
+      : method_(method) {
+  }
+
+  R Run(const T* object) {
+    return (object->*method_)();
+  }
+
+ private:
+  R (T::*method_)() const;
+};
+
+// Function: Arity 1.
+template <typename R, typename A1>
+class RunnableAdapter<R(*)(A1)> {
+ public:
+  typedef R (RunType)(A1);
+
+  explicit RunnableAdapter(R(*function)(A1))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1) {
+    return function_(CallbackForward(a1));
+  }
+
+ private:
+  R (*function_)(A1);
+};
+
+// Method: Arity 1.
+template <typename R, typename T, typename A1>
+class RunnableAdapter<R(T::*)(A1)> {
+ public:
+  typedef R (RunType)(T*, A1);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1))
+      : method_(method) {
+  }
+
+  R Run(T* object, typename CallbackParamTraits<A1>::ForwardType a1) {
+    return (object->*method_)(CallbackForward(a1));
+  }
+
+ private:
+  R (T::*method_)(A1);
+};
+
+// Const Method: Arity 1.
+template <typename R, typename T, typename A1>
+class RunnableAdapter<R(T::*)(A1) const> {
+ public:
+  typedef R (RunType)(const T*, A1);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1) const)
+      : method_(method) {
+  }
+
+  R Run(const T* object, typename CallbackParamTraits<A1>::ForwardType a1) {
+    return (object->*method_)(CallbackForward(a1));
+  }
+
+ private:
+  R (T::*method_)(A1) const;
+};
+
+// Function: Arity 2.
+template <typename R, typename A1, typename A2>
+class RunnableAdapter<R(*)(A1, A2)> {
+ public:
+  typedef R (RunType)(A1, A2);
+
+  explicit RunnableAdapter(R(*function)(A1, A2))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2) {
+    return function_(CallbackForward(a1), CallbackForward(a2));
+  }
+
+ private:
+  R (*function_)(A1, A2);
+};
+
+// Method: Arity 2.
+template <typename R, typename T, typename A1, typename A2>
+class RunnableAdapter<R(T::*)(A1, A2)> {
+ public:
+  typedef R (RunType)(T*, A1, A2);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2))
+      : method_(method) {
+  }
+
+  R Run(T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2));
+  }
+
+ private:
+  R (T::*method_)(A1, A2);
+};
+
+// Const Method: Arity 2.
+template <typename R, typename T, typename A1, typename A2>
+class RunnableAdapter<R(T::*)(A1, A2) const> {
+ public:
+  typedef R (RunType)(const T*, A1, A2);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2) const)
+      : method_(method) {
+  }
+
+  R Run(const T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2));
+  }
+
+ private:
+  R (T::*method_)(A1, A2) const;
+};
+
+// Function: Arity 3.
+template <typename R, typename A1, typename A2, typename A3>
+class RunnableAdapter<R(*)(A1, A2, A3)> {
+ public:
+  typedef R (RunType)(A1, A2, A3);
+
+  explicit RunnableAdapter(R(*function)(A1, A2, A3))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3) {
+    return function_(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3));
+  }
+
+ private:
+  R (*function_)(A1, A2, A3);
+};
+
+// Method: Arity 3.
+template <typename R, typename T, typename A1, typename A2, typename A3>
+class RunnableAdapter<R(T::*)(A1, A2, A3)> {
+ public:
+  typedef R (RunType)(T*, A1, A2, A3);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3))
+      : method_(method) {
+  }
+
+  R Run(T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3);
+};
+
+// Const Method: Arity 3.
+template <typename R, typename T, typename A1, typename A2, typename A3>
+class RunnableAdapter<R(T::*)(A1, A2, A3) const> {
+ public:
+  typedef R (RunType)(const T*, A1, A2, A3);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3) const)
+      : method_(method) {
+  }
+
+  R Run(const T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3) const;
+};
+
+// Function: Arity 4.
+template <typename R, typename A1, typename A2, typename A3, typename A4>
+class RunnableAdapter<R(*)(A1, A2, A3, A4)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4);
+
+  explicit RunnableAdapter(R(*function)(A1, A2, A3, A4))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4) {
+    return function_(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4));
+  }
+
+ private:
+  R (*function_)(A1, A2, A3, A4);
+};
+
+// Method: Arity 4.
+template <typename R, typename T, typename A1, typename A2, typename A3,
+    typename A4>
+class RunnableAdapter<R(T::*)(A1, A2, A3, A4)> {
+ public:
+  typedef R (RunType)(T*, A1, A2, A3, A4);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3, A4))
+      : method_(method) {
+  }
+
+  R Run(T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3, A4);
+};
+
+// Const Method: Arity 4.
+template <typename R, typename T, typename A1, typename A2, typename A3,
+    typename A4>
+class RunnableAdapter<R(T::*)(A1, A2, A3, A4) const> {
+ public:
+  typedef R (RunType)(const T*, A1, A2, A3, A4);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3, A4) const)
+      : method_(method) {
+  }
+
+  R Run(const T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3, A4) const;
+};
+
+// Function: Arity 5.
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5>
+class RunnableAdapter<R(*)(A1, A2, A3, A4, A5)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4, A5);
+
+  explicit RunnableAdapter(R(*function)(A1, A2, A3, A4, A5))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5) {
+    return function_(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5));
+  }
+
+ private:
+  R (*function_)(A1, A2, A3, A4, A5);
+};
+
+// Method: Arity 5.
+template <typename R, typename T, typename A1, typename A2, typename A3,
+    typename A4, typename A5>
+class RunnableAdapter<R(T::*)(A1, A2, A3, A4, A5)> {
+ public:
+  typedef R (RunType)(T*, A1, A2, A3, A4, A5);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3, A4, A5))
+      : method_(method) {
+  }
+
+  R Run(T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3, A4, A5);
+};
+
+// Const Method: Arity 5.
+template <typename R, typename T, typename A1, typename A2, typename A3,
+    typename A4, typename A5>
+class RunnableAdapter<R(T::*)(A1, A2, A3, A4, A5) const> {
+ public:
+  typedef R (RunType)(const T*, A1, A2, A3, A4, A5);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3, A4, A5) const)
+      : method_(method) {
+  }
+
+  R Run(const T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3, A4, A5) const;
+};
+
+// Function: Arity 6.
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6>
+class RunnableAdapter<R(*)(A1, A2, A3, A4, A5, A6)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4, A5, A6);
+
+  explicit RunnableAdapter(R(*function)(A1, A2, A3, A4, A5, A6))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5,
+      typename CallbackParamTraits<A6>::ForwardType a6) {
+    return function_(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5),
+        CallbackForward(a6));
+  }
+
+ private:
+  R (*function_)(A1, A2, A3, A4, A5, A6);
+};
+
+// Method: Arity 6.
+template <typename R, typename T, typename A1, typename A2, typename A3,
+    typename A4, typename A5, typename A6>
+class RunnableAdapter<R(T::*)(A1, A2, A3, A4, A5, A6)> {
+ public:
+  typedef R (RunType)(T*, A1, A2, A3, A4, A5, A6);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3, A4, A5, A6))
+      : method_(method) {
+  }
+
+  R Run(T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5,
+      typename CallbackParamTraits<A6>::ForwardType a6) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5),
+        CallbackForward(a6));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3, A4, A5, A6);
+};
+
+// Const Method: Arity 6.
+template <typename R, typename T, typename A1, typename A2, typename A3,
+    typename A4, typename A5, typename A6>
+class RunnableAdapter<R(T::*)(A1, A2, A3, A4, A5, A6) const> {
+ public:
+  typedef R (RunType)(const T*, A1, A2, A3, A4, A5, A6);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3, A4, A5, A6) const)
+      : method_(method) {
+  }
+
+  R Run(const T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5,
+      typename CallbackParamTraits<A6>::ForwardType a6) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5),
+        CallbackForward(a6));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3, A4, A5, A6) const;
+};
+
+// Function: Arity 7.
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6, typename A7>
+class RunnableAdapter<R(*)(A1, A2, A3, A4, A5, A6, A7)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4, A5, A6, A7);
+
+  explicit RunnableAdapter(R(*function)(A1, A2, A3, A4, A5, A6, A7))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5,
+      typename CallbackParamTraits<A6>::ForwardType a6,
+      typename CallbackParamTraits<A7>::ForwardType a7) {
+    return function_(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5),
+        CallbackForward(a6), CallbackForward(a7));
+  }
+
+ private:
+  R (*function_)(A1, A2, A3, A4, A5, A6, A7);
+};
+
+// Method: Arity 7.
+template <typename R, typename T, typename A1, typename A2, typename A3,
+    typename A4, typename A5, typename A6, typename A7>
+class RunnableAdapter<R(T::*)(A1, A2, A3, A4, A5, A6, A7)> {
+ public:
+  typedef R (RunType)(T*, A1, A2, A3, A4, A5, A6, A7);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3, A4, A5, A6, A7))
+      : method_(method) {
+  }
+
+  R Run(T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5,
+      typename CallbackParamTraits<A6>::ForwardType a6,
+      typename CallbackParamTraits<A7>::ForwardType a7) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5),
+        CallbackForward(a6), CallbackForward(a7));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3, A4, A5, A6, A7);
+};
+
+// Const Method: Arity 7.
+template <typename R, typename T, typename A1, typename A2, typename A3,
+    typename A4, typename A5, typename A6, typename A7>
+class RunnableAdapter<R(T::*)(A1, A2, A3, A4, A5, A6, A7) const> {
+ public:
+  typedef R (RunType)(const T*, A1, A2, A3, A4, A5, A6, A7);
+  typedef true_type IsMethod;
+
+  explicit RunnableAdapter(R(T::*method)(A1, A2, A3, A4, A5, A6, A7) const)
+      : method_(method) {
+  }
+
+  R Run(const T* object, typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5,
+      typename CallbackParamTraits<A6>::ForwardType a6,
+      typename CallbackParamTraits<A7>::ForwardType a7) {
+    return (object->*method_)(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5),
+        CallbackForward(a6), CallbackForward(a7));
+  }
+
+ private:
+  R (T::*method_)(A1, A2, A3, A4, A5, A6, A7) const;
+};
+
+
+// FunctionTraits<>
+//
+// Breaks a function signature apart into typedefs for easier introspection.
+template <typename Sig>
+struct FunctionTraits;
+
+template <typename R>
+struct FunctionTraits<R()> {
+  typedef R ReturnType;
+};
+
+template <typename R, typename A1>
+struct FunctionTraits<R(A1)> {
+  typedef R ReturnType;
+  typedef A1 A1Type;
+};
+
+template <typename R, typename A1, typename A2>
+struct FunctionTraits<R(A1, A2)> {
+  typedef R ReturnType;
+  typedef A1 A1Type;
+  typedef A2 A2Type;
+};
+
+template <typename R, typename A1, typename A2, typename A3>
+struct FunctionTraits<R(A1, A2, A3)> {
+  typedef R ReturnType;
+  typedef A1 A1Type;
+  typedef A2 A2Type;
+  typedef A3 A3Type;
+};
+
+template <typename R, typename A1, typename A2, typename A3, typename A4>
+struct FunctionTraits<R(A1, A2, A3, A4)> {
+  typedef R ReturnType;
+  typedef A1 A1Type;
+  typedef A2 A2Type;
+  typedef A3 A3Type;
+  typedef A4 A4Type;
+};
+
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5>
+struct FunctionTraits<R(A1, A2, A3, A4, A5)> {
+  typedef R ReturnType;
+  typedef A1 A1Type;
+  typedef A2 A2Type;
+  typedef A3 A3Type;
+  typedef A4 A4Type;
+  typedef A5 A5Type;
+};
+
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6>
+struct FunctionTraits<R(A1, A2, A3, A4, A5, A6)> {
+  typedef R ReturnType;
+  typedef A1 A1Type;
+  typedef A2 A2Type;
+  typedef A3 A3Type;
+  typedef A4 A4Type;
+  typedef A5 A5Type;
+  typedef A6 A6Type;
+};
+
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6, typename A7>
+struct FunctionTraits<R(A1, A2, A3, A4, A5, A6, A7)> {
+  typedef R ReturnType;
+  typedef A1 A1Type;
+  typedef A2 A2Type;
+  typedef A3 A3Type;
+  typedef A4 A4Type;
+  typedef A5 A5Type;
+  typedef A6 A6Type;
+  typedef A7 A7Type;
+};
+
+
+// ForceVoidReturn<>
+//
+// Set of templates that support forcing the function return type to void.
+template <typename Sig>
+struct ForceVoidReturn;
+
+template <typename R>
+struct ForceVoidReturn<R()> {
+  typedef void(RunType)();
+};
+
+template <typename R, typename A1>
+struct ForceVoidReturn<R(A1)> {
+  typedef void(RunType)(A1);
+};
+
+template <typename R, typename A1, typename A2>
+struct ForceVoidReturn<R(A1, A2)> {
+  typedef void(RunType)(A1, A2);
+};
+
+template <typename R, typename A1, typename A2, typename A3>
+struct ForceVoidReturn<R(A1, A2, A3)> {
+  typedef void(RunType)(A1, A2, A3);
+};
+
+template <typename R, typename A1, typename A2, typename A3, typename A4>
+struct ForceVoidReturn<R(A1, A2, A3, A4)> {
+  typedef void(RunType)(A1, A2, A3, A4);
+};
+
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5>
+struct ForceVoidReturn<R(A1, A2, A3, A4, A5)> {
+  typedef void(RunType)(A1, A2, A3, A4, A5);
+};
+
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6>
+struct ForceVoidReturn<R(A1, A2, A3, A4, A5, A6)> {
+  typedef void(RunType)(A1, A2, A3, A4, A5, A6);
+};
+
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6, typename A7>
+struct ForceVoidReturn<R(A1, A2, A3, A4, A5, A6, A7)> {
+  typedef void(RunType)(A1, A2, A3, A4, A5, A6, A7);
+};
+
+
+// FunctorTraits<>
+//
+// See description at top of file.
+template <typename T>
+struct FunctorTraits {
+  typedef RunnableAdapter<T> RunnableType;
+  typedef typename RunnableType::RunType RunType;
+};
+
+template <typename T>
+struct FunctorTraits<IgnoreResultHelper<T> > {
+  typedef typename FunctorTraits<T>::RunnableType RunnableType;
+  typedef typename ForceVoidReturn<
+      typename RunnableType::RunType>::RunType RunType;
+};
+
+template <typename T>
+struct FunctorTraits<Callback<T> > {
+  typedef Callback<T> RunnableType;
+  typedef typename Callback<T>::RunType RunType;
+};
+
+
+// MakeRunnable<>
+//
+// Converts a passed in functor to a RunnableType using type inference.
+
+template <typename T>
+typename FunctorTraits<T>::RunnableType MakeRunnable(const T& t) {
+  return RunnableAdapter<T>(t);
+}
+
+template <typename T>
+typename FunctorTraits<T>::RunnableType
+MakeRunnable(const IgnoreResultHelper<T>& t) {
+  return MakeRunnable(t.functor_);
+}
+
+template <typename T>
+const typename FunctorTraits<Callback<T> >::RunnableType&
+MakeRunnable(const Callback<T>& t) {
+  DCHECK(!t.is_null());
+  return t;
+}
+
+
+// InvokeHelper<>
+//
+// There are 3 logical InvokeHelper<> specializations: normal, void-return,
+// WeakCalls.
+//
+// The normal type just calls the underlying runnable.
+//
+// We need a InvokeHelper to handle void return types in order to support
+// IgnoreResult().  Normally, if the Runnable's RunType had a void return,
+// the template system would just accept "return functor.Run()" ignoring
+// the fact that a void function is being used with return. This piece of
+// sugar breaks though when the Runnable's RunType is not void.  Thus, we
+// need a partial specialization to change the syntax to drop the "return"
+// from the invocation call.
+//
+// WeakCalls similarly need special syntax that is applied to the first
+// argument to check if they should no-op themselves.
+template <bool IsWeakCall, typename ReturnType, typename Runnable,
+          typename ArgsType>
+struct InvokeHelper;
+
+template <typename ReturnType, typename Runnable>
+struct InvokeHelper<false, ReturnType, Runnable,
+    void()>  {
+  static ReturnType MakeItSo(Runnable runnable) {
+    return runnable.Run();
+  }
+};
+
+template <typename Runnable>
+struct InvokeHelper<false, void, Runnable,
+    void()>  {
+  static void MakeItSo(Runnable runnable) {
+    runnable.Run();
+  }
+};
+
+template <typename ReturnType, typename Runnable,typename A1>
+struct InvokeHelper<false, ReturnType, Runnable,
+    void(A1)>  {
+  static ReturnType MakeItSo(Runnable runnable, A1 a1) {
+    return runnable.Run(CallbackForward(a1));
+  }
+};
+
+template <typename Runnable,typename A1>
+struct InvokeHelper<false, void, Runnable,
+    void(A1)>  {
+  static void MakeItSo(Runnable runnable, A1 a1) {
+    runnable.Run(CallbackForward(a1));
+  }
+};
+
+template <typename Runnable, typename BoundWeakPtr>
+struct InvokeHelper<true, void, Runnable,
+    void(BoundWeakPtr)>  {
+  static void MakeItSo(Runnable runnable, BoundWeakPtr weak_ptr) {
+    if (!weak_ptr.get()) {
+      return;
+    }
+    runnable.Run(weak_ptr.get());
+  }
+};
+
+template <typename ReturnType, typename Runnable,typename A1, typename A2>
+struct InvokeHelper<false, ReturnType, Runnable,
+    void(A1, A2)>  {
+  static ReturnType MakeItSo(Runnable runnable, A1 a1, A2 a2) {
+    return runnable.Run(CallbackForward(a1), CallbackForward(a2));
+  }
+};
+
+template <typename Runnable,typename A1, typename A2>
+struct InvokeHelper<false, void, Runnable,
+    void(A1, A2)>  {
+  static void MakeItSo(Runnable runnable, A1 a1, A2 a2) {
+    runnable.Run(CallbackForward(a1), CallbackForward(a2));
+  }
+};
+
+template <typename Runnable, typename BoundWeakPtr, typename A2>
+struct InvokeHelper<true, void, Runnable,
+    void(BoundWeakPtr, A2)>  {
+  static void MakeItSo(Runnable runnable, BoundWeakPtr weak_ptr, A2 a2) {
+    if (!weak_ptr.get()) {
+      return;
+    }
+    runnable.Run(weak_ptr.get(), CallbackForward(a2));
+  }
+};
+
+template <typename ReturnType, typename Runnable,typename A1, typename A2,
+    typename A3>
+struct InvokeHelper<false, ReturnType, Runnable,
+    void(A1, A2, A3)>  {
+  static ReturnType MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3) {
+    return runnable.Run(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3));
+  }
+};
+
+template <typename Runnable,typename A1, typename A2, typename A3>
+struct InvokeHelper<false, void, Runnable,
+    void(A1, A2, A3)>  {
+  static void MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3) {
+    runnable.Run(CallbackForward(a1), CallbackForward(a2), CallbackForward(a3));
+  }
+};
+
+template <typename Runnable, typename BoundWeakPtr, typename A2, typename A3>
+struct InvokeHelper<true, void, Runnable,
+    void(BoundWeakPtr, A2, A3)>  {
+  static void MakeItSo(Runnable runnable, BoundWeakPtr weak_ptr, A2 a2, A3 a3) {
+    if (!weak_ptr.get()) {
+      return;
+    }
+    runnable.Run(weak_ptr.get(), CallbackForward(a2), CallbackForward(a3));
+  }
+};
+
+template <typename ReturnType, typename Runnable,typename A1, typename A2,
+    typename A3, typename A4>
+struct InvokeHelper<false, ReturnType, Runnable,
+    void(A1, A2, A3, A4)>  {
+  static ReturnType MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3, A4 a4) {
+    return runnable.Run(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4));
+  }
+};
+
+template <typename Runnable,typename A1, typename A2, typename A3, typename A4>
+struct InvokeHelper<false, void, Runnable,
+    void(A1, A2, A3, A4)>  {
+  static void MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3, A4 a4) {
+    runnable.Run(CallbackForward(a1), CallbackForward(a2), CallbackForward(a3),
+        CallbackForward(a4));
+  }
+};
+
+template <typename Runnable, typename BoundWeakPtr, typename A2, typename A3,
+    typename A4>
+struct InvokeHelper<true, void, Runnable,
+    void(BoundWeakPtr, A2, A3, A4)>  {
+  static void MakeItSo(Runnable runnable, BoundWeakPtr weak_ptr, A2 a2, A3 a3,
+      A4 a4) {
+    if (!weak_ptr.get()) {
+      return;
+    }
+    runnable.Run(weak_ptr.get(), CallbackForward(a2), CallbackForward(a3),
+        CallbackForward(a4));
+  }
+};
+
+template <typename ReturnType, typename Runnable,typename A1, typename A2,
+    typename A3, typename A4, typename A5>
+struct InvokeHelper<false, ReturnType, Runnable,
+    void(A1, A2, A3, A4, A5)>  {
+  static ReturnType MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3, A4 a4,
+      A5 a5) {
+    return runnable.Run(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5));
+  }
+};
+
+template <typename Runnable,typename A1, typename A2, typename A3, typename A4,
+    typename A5>
+struct InvokeHelper<false, void, Runnable,
+    void(A1, A2, A3, A4, A5)>  {
+  static void MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5) {
+    runnable.Run(CallbackForward(a1), CallbackForward(a2), CallbackForward(a3),
+        CallbackForward(a4), CallbackForward(a5));
+  }
+};
+
+template <typename Runnable, typename BoundWeakPtr, typename A2, typename A3,
+    typename A4, typename A5>
+struct InvokeHelper<true, void, Runnable,
+    void(BoundWeakPtr, A2, A3, A4, A5)>  {
+  static void MakeItSo(Runnable runnable, BoundWeakPtr weak_ptr, A2 a2, A3 a3,
+      A4 a4, A5 a5) {
+    if (!weak_ptr.get()) {
+      return;
+    }
+    runnable.Run(weak_ptr.get(), CallbackForward(a2), CallbackForward(a3),
+        CallbackForward(a4), CallbackForward(a5));
+  }
+};
+
+template <typename ReturnType, typename Runnable,typename A1, typename A2,
+    typename A3, typename A4, typename A5, typename A6>
+struct InvokeHelper<false, ReturnType, Runnable,
+    void(A1, A2, A3, A4, A5, A6)>  {
+  static ReturnType MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3, A4 a4,
+      A5 a5, A6 a6) {
+    return runnable.Run(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5),
+        CallbackForward(a6));
+  }
+};
+
+template <typename Runnable,typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6>
+struct InvokeHelper<false, void, Runnable,
+    void(A1, A2, A3, A4, A5, A6)>  {
+  static void MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5,
+      A6 a6) {
+    runnable.Run(CallbackForward(a1), CallbackForward(a2), CallbackForward(a3),
+        CallbackForward(a4), CallbackForward(a5), CallbackForward(a6));
+  }
+};
+
+template <typename Runnable, typename BoundWeakPtr, typename A2, typename A3,
+    typename A4, typename A5, typename A6>
+struct InvokeHelper<true, void, Runnable,
+    void(BoundWeakPtr, A2, A3, A4, A5, A6)>  {
+  static void MakeItSo(Runnable runnable, BoundWeakPtr weak_ptr, A2 a2, A3 a3,
+      A4 a4, A5 a5, A6 a6) {
+    if (!weak_ptr.get()) {
+      return;
+    }
+    runnable.Run(weak_ptr.get(), CallbackForward(a2), CallbackForward(a3),
+        CallbackForward(a4), CallbackForward(a5), CallbackForward(a6));
+  }
+};
+
+template <typename ReturnType, typename Runnable,typename A1, typename A2,
+    typename A3, typename A4, typename A5, typename A6, typename A7>
+struct InvokeHelper<false, ReturnType, Runnable,
+    void(A1, A2, A3, A4, A5, A6, A7)>  {
+  static ReturnType MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3, A4 a4,
+      A5 a5, A6 a6, A7 a7) {
+    return runnable.Run(CallbackForward(a1), CallbackForward(a2),
+        CallbackForward(a3), CallbackForward(a4), CallbackForward(a5),
+        CallbackForward(a6), CallbackForward(a7));
+  }
+};
+
+template <typename Runnable,typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6, typename A7>
+struct InvokeHelper<false, void, Runnable,
+    void(A1, A2, A3, A4, A5, A6, A7)>  {
+  static void MakeItSo(Runnable runnable, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5,
+      A6 a6, A7 a7) {
+    runnable.Run(CallbackForward(a1), CallbackForward(a2), CallbackForward(a3),
+        CallbackForward(a4), CallbackForward(a5), CallbackForward(a6),
+        CallbackForward(a7));
+  }
+};
+
+template <typename Runnable, typename BoundWeakPtr, typename A2, typename A3,
+    typename A4, typename A5, typename A6, typename A7>
+struct InvokeHelper<true, void, Runnable,
+    void(BoundWeakPtr, A2, A3, A4, A5, A6, A7)>  {
+  static void MakeItSo(Runnable runnable, BoundWeakPtr weak_ptr, A2 a2, A3 a3,
+      A4 a4, A5 a5, A6 a6, A7 a7) {
+    if (!weak_ptr.get()) {
+      return;
+    }
+    runnable.Run(weak_ptr.get(), CallbackForward(a2), CallbackForward(a3),
+        CallbackForward(a4), CallbackForward(a5), CallbackForward(a6),
+        CallbackForward(a7));
+  }
+};
+
+#if !defined(_MSC_VER)
+
+template <typename ReturnType, typename Runnable, typename ArgsType>
+struct InvokeHelper<true, ReturnType, Runnable, ArgsType> {
+  // WeakCalls are only supported for functions with a void return type.
+  // Otherwise, the function result would be undefined if the the WeakPtr<>
+  // is invalidated.
+  COMPILE_ASSERT(is_void<ReturnType>::value,
+                 weak_ptrs_can_only_bind_to_methods_without_return_values);
+};
+
+#endif
+
+// Invoker<>
+//
+// See description at the top of the file.
+template <int NumBound, typename Storage, typename RunType>
+struct Invoker;
+
+// Arity 0 -> 0.
+template <typename StorageType, typename R>
+struct Invoker<0, StorageType, R()> {
+  typedef R(RunType)(BindStateBase*);
+
+  typedef R(UnboundRunType)();
+
+  static R Run(BindStateBase* base) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void()>
+               ::MakeItSo(storage->runnable_);
+  }
+};
+
+// Arity 1 -> 1.
+template <typename StorageType, typename R,typename X1>
+struct Invoker<0, StorageType, R(X1)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X1>::ForwardType);
+
+  typedef R(UnboundRunType)(X1);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X1>::ForwardType x1) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename CallbackParamTraits<X1>::ForwardType x1)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1));
+  }
+};
+
+// Arity 1 -> 0.
+template <typename StorageType, typename R,typename X1>
+struct Invoker<1, StorageType, R(X1)> {
+  typedef R(RunType)(BindStateBase*);
+
+  typedef R(UnboundRunType)();
+
+  static R Run(BindStateBase* base) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1));
+  }
+};
+
+// Arity 2 -> 2.
+template <typename StorageType, typename R,typename X1, typename X2>
+struct Invoker<0, StorageType, R(X1, X2)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X1>::ForwardType,
+      typename CallbackParamTraits<X2>::ForwardType);
+
+  typedef R(UnboundRunType)(X1, X2);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X1>::ForwardType x1,
+      typename CallbackParamTraits<X2>::ForwardType x2) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename CallbackParamTraits<X1>::ForwardType x1,
+               typename CallbackParamTraits<X2>::ForwardType x2)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2));
+  }
+};
+
+// Arity 2 -> 1.
+template <typename StorageType, typename R,typename X1, typename X2>
+struct Invoker<1, StorageType, R(X1, X2)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X2>::ForwardType);
+
+  typedef R(UnboundRunType)(X2);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X2>::ForwardType x2) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X2>::ForwardType x2)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2));
+  }
+};
+
+// Arity 2 -> 0.
+template <typename StorageType, typename R,typename X1, typename X2>
+struct Invoker<2, StorageType, R(X1, X2)> {
+  typedef R(RunType)(BindStateBase*);
+
+  typedef R(UnboundRunType)();
+
+  static R Run(BindStateBase* base) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2));
+  }
+};
+
+// Arity 3 -> 3.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3>
+struct Invoker<0, StorageType, R(X1, X2, X3)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X1>::ForwardType,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType);
+
+  typedef R(UnboundRunType)(X1, X2, X3);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X1>::ForwardType x1,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename CallbackParamTraits<X1>::ForwardType x1,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3));
+  }
+};
+
+// Arity 3 -> 2.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3>
+struct Invoker<1, StorageType, R(X1, X2, X3)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType);
+
+  typedef R(UnboundRunType)(X2, X3);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3));
+  }
+};
+
+// Arity 3 -> 1.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3>
+struct Invoker<2, StorageType, R(X1, X2, X3)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X3>::ForwardType);
+
+  typedef R(UnboundRunType)(X3);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X3>::ForwardType x3) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X3>::ForwardType x3)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3));
+  }
+};
+
+// Arity 3 -> 0.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3>
+struct Invoker<3, StorageType, R(X1, X2, X3)> {
+  typedef R(RunType)(BindStateBase*);
+
+  typedef R(UnboundRunType)();
+
+  static R Run(BindStateBase* base) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3));
+  }
+};
+
+// Arity 4 -> 4.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4>
+struct Invoker<0, StorageType, R(X1, X2, X3, X4)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X1>::ForwardType,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType);
+
+  typedef R(UnboundRunType)(X1, X2, X3, X4);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X1>::ForwardType x1,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename CallbackParamTraits<X1>::ForwardType x1,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4));
+  }
+};
+
+// Arity 4 -> 3.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4>
+struct Invoker<1, StorageType, R(X1, X2, X3, X4)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType);
+
+  typedef R(UnboundRunType)(X2, X3, X4);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4));
+  }
+};
+
+// Arity 4 -> 2.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4>
+struct Invoker<2, StorageType, R(X1, X2, X3, X4)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType);
+
+  typedef R(UnboundRunType)(X3, X4);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4));
+  }
+};
+
+// Arity 4 -> 1.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4>
+struct Invoker<3, StorageType, R(X1, X2, X3, X4)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X4>::ForwardType);
+
+  typedef R(UnboundRunType)(X4);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X4>::ForwardType x4) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X4>::ForwardType x4)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4));
+  }
+};
+
+// Arity 4 -> 0.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4>
+struct Invoker<4, StorageType, R(X1, X2, X3, X4)> {
+  typedef R(RunType)(BindStateBase*);
+
+  typedef R(UnboundRunType)();
+
+  static R Run(BindStateBase* base) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4));
+  }
+};
+
+// Arity 5 -> 5.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5>
+struct Invoker<0, StorageType, R(X1, X2, X3, X4, X5)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X1>::ForwardType,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType);
+
+  typedef R(UnboundRunType)(X1, X2, X3, X4, X5);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X1>::ForwardType x1,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename CallbackParamTraits<X1>::ForwardType x1,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5));
+  }
+};
+
+// Arity 5 -> 4.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5>
+struct Invoker<1, StorageType, R(X1, X2, X3, X4, X5)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType);
+
+  typedef R(UnboundRunType)(X2, X3, X4, X5);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5));
+  }
+};
+
+// Arity 5 -> 3.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5>
+struct Invoker<2, StorageType, R(X1, X2, X3, X4, X5)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType);
+
+  typedef R(UnboundRunType)(X3, X4, X5);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5));
+  }
+};
+
+// Arity 5 -> 2.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5>
+struct Invoker<3, StorageType, R(X1, X2, X3, X4, X5)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType);
+
+  typedef R(UnboundRunType)(X4, X5);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5));
+  }
+};
+
+// Arity 5 -> 1.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5>
+struct Invoker<4, StorageType, R(X1, X2, X3, X4, X5)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X5>::ForwardType);
+
+  typedef R(UnboundRunType)(X5);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X5>::ForwardType x5) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X5>::ForwardType x5)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5));
+  }
+};
+
+// Arity 5 -> 0.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5>
+struct Invoker<5, StorageType, R(X1, X2, X3, X4, X5)> {
+  typedef R(RunType)(BindStateBase*);
+
+  typedef R(UnboundRunType)();
+
+  static R Run(BindStateBase* base) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+    typedef typename StorageType::Bound5UnwrapTraits Bound5UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    typename Bound5UnwrapTraits::ForwardType x5 =
+        Bound5UnwrapTraits::Unwrap(storage->p5_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename Bound5UnwrapTraits::ForwardType)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5));
+  }
+};
+
+// Arity 6 -> 6.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6>
+struct Invoker<0, StorageType, R(X1, X2, X3, X4, X5, X6)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X1>::ForwardType,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType);
+
+  typedef R(UnboundRunType)(X1, X2, X3, X4, X5, X6);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X1>::ForwardType x1,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename CallbackParamTraits<X1>::ForwardType x1,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6));
+  }
+};
+
+// Arity 6 -> 5.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6>
+struct Invoker<1, StorageType, R(X1, X2, X3, X4, X5, X6)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType);
+
+  typedef R(UnboundRunType)(X2, X3, X4, X5, X6);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6));
+  }
+};
+
+// Arity 6 -> 4.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6>
+struct Invoker<2, StorageType, R(X1, X2, X3, X4, X5, X6)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType);
+
+  typedef R(UnboundRunType)(X3, X4, X5, X6);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6));
+  }
+};
+
+// Arity 6 -> 3.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6>
+struct Invoker<3, StorageType, R(X1, X2, X3, X4, X5, X6)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType);
+
+  typedef R(UnboundRunType)(X4, X5, X6);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6));
+  }
+};
+
+// Arity 6 -> 2.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6>
+struct Invoker<4, StorageType, R(X1, X2, X3, X4, X5, X6)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType);
+
+  typedef R(UnboundRunType)(X5, X6);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6));
+  }
+};
+
+// Arity 6 -> 1.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6>
+struct Invoker<5, StorageType, R(X1, X2, X3, X4, X5, X6)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X6>::ForwardType);
+
+  typedef R(UnboundRunType)(X6);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X6>::ForwardType x6) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+    typedef typename StorageType::Bound5UnwrapTraits Bound5UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    typename Bound5UnwrapTraits::ForwardType x5 =
+        Bound5UnwrapTraits::Unwrap(storage->p5_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename Bound5UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X6>::ForwardType x6)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6));
+  }
+};
+
+// Arity 6 -> 0.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6>
+struct Invoker<6, StorageType, R(X1, X2, X3, X4, X5, X6)> {
+  typedef R(RunType)(BindStateBase*);
+
+  typedef R(UnboundRunType)();
+
+  static R Run(BindStateBase* base) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+    typedef typename StorageType::Bound5UnwrapTraits Bound5UnwrapTraits;
+    typedef typename StorageType::Bound6UnwrapTraits Bound6UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    typename Bound5UnwrapTraits::ForwardType x5 =
+        Bound5UnwrapTraits::Unwrap(storage->p5_);
+    typename Bound6UnwrapTraits::ForwardType x6 =
+        Bound6UnwrapTraits::Unwrap(storage->p6_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename Bound5UnwrapTraits::ForwardType,
+               typename Bound6UnwrapTraits::ForwardType)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6));
+  }
+};
+
+// Arity 7 -> 7.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6, typename X7>
+struct Invoker<0, StorageType, R(X1, X2, X3, X4, X5, X6, X7)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X1>::ForwardType,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType,
+      typename CallbackParamTraits<X7>::ForwardType);
+
+  typedef R(UnboundRunType)(X1, X2, X3, X4, X5, X6, X7);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X1>::ForwardType x1,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6,
+      typename CallbackParamTraits<X7>::ForwardType x7) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename CallbackParamTraits<X1>::ForwardType x1,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6,
+               typename CallbackParamTraits<X7>::ForwardType x7)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6), CallbackForward(x7));
+  }
+};
+
+// Arity 7 -> 6.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6, typename X7>
+struct Invoker<1, StorageType, R(X1, X2, X3, X4, X5, X6, X7)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X2>::ForwardType,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType,
+      typename CallbackParamTraits<X7>::ForwardType);
+
+  typedef R(UnboundRunType)(X2, X3, X4, X5, X6, X7);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X2>::ForwardType x2,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6,
+      typename CallbackParamTraits<X7>::ForwardType x7) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X2>::ForwardType x2,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6,
+               typename CallbackParamTraits<X7>::ForwardType x7)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6), CallbackForward(x7));
+  }
+};
+
+// Arity 7 -> 5.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6, typename X7>
+struct Invoker<2, StorageType, R(X1, X2, X3, X4, X5, X6, X7)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X3>::ForwardType,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType,
+      typename CallbackParamTraits<X7>::ForwardType);
+
+  typedef R(UnboundRunType)(X3, X4, X5, X6, X7);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X3>::ForwardType x3,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6,
+      typename CallbackParamTraits<X7>::ForwardType x7) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X3>::ForwardType x3,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6,
+               typename CallbackParamTraits<X7>::ForwardType x7)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6), CallbackForward(x7));
+  }
+};
+
+// Arity 7 -> 4.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6, typename X7>
+struct Invoker<3, StorageType, R(X1, X2, X3, X4, X5, X6, X7)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X4>::ForwardType,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType,
+      typename CallbackParamTraits<X7>::ForwardType);
+
+  typedef R(UnboundRunType)(X4, X5, X6, X7);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X4>::ForwardType x4,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6,
+      typename CallbackParamTraits<X7>::ForwardType x7) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X4>::ForwardType x4,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6,
+               typename CallbackParamTraits<X7>::ForwardType x7)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6), CallbackForward(x7));
+  }
+};
+
+// Arity 7 -> 3.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6, typename X7>
+struct Invoker<4, StorageType, R(X1, X2, X3, X4, X5, X6, X7)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X5>::ForwardType,
+      typename CallbackParamTraits<X6>::ForwardType,
+      typename CallbackParamTraits<X7>::ForwardType);
+
+  typedef R(UnboundRunType)(X5, X6, X7);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X5>::ForwardType x5,
+      typename CallbackParamTraits<X6>::ForwardType x6,
+      typename CallbackParamTraits<X7>::ForwardType x7) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X5>::ForwardType x5,
+               typename CallbackParamTraits<X6>::ForwardType x6,
+               typename CallbackParamTraits<X7>::ForwardType x7)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6), CallbackForward(x7));
+  }
+};
+
+// Arity 7 -> 2.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6, typename X7>
+struct Invoker<5, StorageType, R(X1, X2, X3, X4, X5, X6, X7)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X6>::ForwardType,
+      typename CallbackParamTraits<X7>::ForwardType);
+
+  typedef R(UnboundRunType)(X6, X7);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X6>::ForwardType x6,
+      typename CallbackParamTraits<X7>::ForwardType x7) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+    typedef typename StorageType::Bound5UnwrapTraits Bound5UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    typename Bound5UnwrapTraits::ForwardType x5 =
+        Bound5UnwrapTraits::Unwrap(storage->p5_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename Bound5UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X6>::ForwardType x6,
+               typename CallbackParamTraits<X7>::ForwardType x7)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6), CallbackForward(x7));
+  }
+};
+
+// Arity 7 -> 1.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6, typename X7>
+struct Invoker<6, StorageType, R(X1, X2, X3, X4, X5, X6, X7)> {
+  typedef R(RunType)(BindStateBase*,
+      typename CallbackParamTraits<X7>::ForwardType);
+
+  typedef R(UnboundRunType)(X7);
+
+  static R Run(BindStateBase* base,
+      typename CallbackParamTraits<X7>::ForwardType x7) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+    typedef typename StorageType::Bound5UnwrapTraits Bound5UnwrapTraits;
+    typedef typename StorageType::Bound6UnwrapTraits Bound6UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    typename Bound5UnwrapTraits::ForwardType x5 =
+        Bound5UnwrapTraits::Unwrap(storage->p5_);
+    typename Bound6UnwrapTraits::ForwardType x6 =
+        Bound6UnwrapTraits::Unwrap(storage->p6_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename Bound5UnwrapTraits::ForwardType,
+               typename Bound6UnwrapTraits::ForwardType,
+               typename CallbackParamTraits<X7>::ForwardType x7)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6), CallbackForward(x7));
+  }
+};
+
+// Arity 7 -> 0.
+template <typename StorageType, typename R,typename X1, typename X2,
+    typename X3, typename X4, typename X5, typename X6, typename X7>
+struct Invoker<7, StorageType, R(X1, X2, X3, X4, X5, X6, X7)> {
+  typedef R(RunType)(BindStateBase*);
+
+  typedef R(UnboundRunType)();
+
+  static R Run(BindStateBase* base) {
+    StorageType* storage = static_cast<StorageType*>(base);
+
+    // Local references to make debugger stepping easier. If in a debugger,
+    // you really want to warp ahead and step through the
+    // InvokeHelper<>::MakeItSo() call below.
+    typedef typename StorageType::Bound1UnwrapTraits Bound1UnwrapTraits;
+    typedef typename StorageType::Bound2UnwrapTraits Bound2UnwrapTraits;
+    typedef typename StorageType::Bound3UnwrapTraits Bound3UnwrapTraits;
+    typedef typename StorageType::Bound4UnwrapTraits Bound4UnwrapTraits;
+    typedef typename StorageType::Bound5UnwrapTraits Bound5UnwrapTraits;
+    typedef typename StorageType::Bound6UnwrapTraits Bound6UnwrapTraits;
+    typedef typename StorageType::Bound7UnwrapTraits Bound7UnwrapTraits;
+
+    typename Bound1UnwrapTraits::ForwardType x1 =
+        Bound1UnwrapTraits::Unwrap(storage->p1_);
+    typename Bound2UnwrapTraits::ForwardType x2 =
+        Bound2UnwrapTraits::Unwrap(storage->p2_);
+    typename Bound3UnwrapTraits::ForwardType x3 =
+        Bound3UnwrapTraits::Unwrap(storage->p3_);
+    typename Bound4UnwrapTraits::ForwardType x4 =
+        Bound4UnwrapTraits::Unwrap(storage->p4_);
+    typename Bound5UnwrapTraits::ForwardType x5 =
+        Bound5UnwrapTraits::Unwrap(storage->p5_);
+    typename Bound6UnwrapTraits::ForwardType x6 =
+        Bound6UnwrapTraits::Unwrap(storage->p6_);
+    typename Bound7UnwrapTraits::ForwardType x7 =
+        Bound7UnwrapTraits::Unwrap(storage->p7_);
+    return InvokeHelper<StorageType::IsWeakCall::value, R,
+           typename StorageType::RunnableType,
+           void(typename Bound1UnwrapTraits::ForwardType,
+               typename Bound2UnwrapTraits::ForwardType,
+               typename Bound3UnwrapTraits::ForwardType,
+               typename Bound4UnwrapTraits::ForwardType,
+               typename Bound5UnwrapTraits::ForwardType,
+               typename Bound6UnwrapTraits::ForwardType,
+               typename Bound7UnwrapTraits::ForwardType)>
+               ::MakeItSo(storage->runnable_, CallbackForward(x1),
+                   CallbackForward(x2), CallbackForward(x3),
+                   CallbackForward(x4), CallbackForward(x5),
+                   CallbackForward(x6), CallbackForward(x7));
+  }
+};
+
+
+// BindState<>
+//
+// This stores all the state passed into Bind() and is also where most
+// of the template resolution magic occurs.
+//
+// Runnable is the functor we are binding arguments to.
+// RunType is type of the Run() function that the Invoker<> should use.
+// Normally, this is the same as the RunType of the Runnable, but it can
+// be different if an adapter like IgnoreResult() has been used.
+//
+// BoundArgsType contains the storage type for all the bound arguments by
+// (ab)using a function type.
+template <typename Runnable, typename RunType, typename BoundArgsType>
+struct BindState;
+
+template <typename Runnable, typename RunType>
+struct BindState<Runnable, RunType, void()> : public BindStateBase {
+  typedef Runnable RunnableType;
+  typedef false_type IsWeakCall;
+  typedef Invoker<0, BindState, RunType> InvokerType;
+  typedef typename InvokerType::UnboundRunType UnboundRunType;
+  explicit BindState(const Runnable& runnable)
+      : runnable_(runnable) {
+  }
+
+  virtual ~BindState() {  }
+
+  RunnableType runnable_;
+};
+
+template <typename Runnable, typename RunType, typename P1>
+struct BindState<Runnable, RunType, void(P1)> : public BindStateBase {
+  typedef Runnable RunnableType;
+  typedef IsWeakMethod<HasIsMethodTag<Runnable>::value, P1> IsWeakCall;
+  typedef Invoker<1, BindState, RunType> InvokerType;
+  typedef typename InvokerType::UnboundRunType UnboundRunType;
+
+  // Convenience typedefs for bound argument types.
+  typedef UnwrapTraits<P1> Bound1UnwrapTraits;
+
+  BindState(const Runnable& runnable, const P1& p1)
+      : runnable_(runnable),
+        p1_(p1) {
+    MaybeRefcount<HasIsMethodTag<Runnable>::value, P1>::AddRef(p1_);
+  }
+
+  virtual ~BindState() {    MaybeRefcount<HasIsMethodTag<Runnable>::value,
+      P1>::Release(p1_);  }
+
+  RunnableType runnable_;
+  P1 p1_;
+};
+
+template <typename Runnable, typename RunType, typename P1, typename P2>
+struct BindState<Runnable, RunType, void(P1, P2)> : public BindStateBase {
+  typedef Runnable RunnableType;
+  typedef IsWeakMethod<HasIsMethodTag<Runnable>::value, P1> IsWeakCall;
+  typedef Invoker<2, BindState, RunType> InvokerType;
+  typedef typename InvokerType::UnboundRunType UnboundRunType;
+
+  // Convenience typedefs for bound argument types.
+  typedef UnwrapTraits<P1> Bound1UnwrapTraits;
+  typedef UnwrapTraits<P2> Bound2UnwrapTraits;
+
+  BindState(const Runnable& runnable, const P1& p1, const P2& p2)
+      : runnable_(runnable),
+        p1_(p1),
+        p2_(p2) {
+    MaybeRefcount<HasIsMethodTag<Runnable>::value, P1>::AddRef(p1_);
+  }
+
+  virtual ~BindState() {    MaybeRefcount<HasIsMethodTag<Runnable>::value,
+      P1>::Release(p1_);  }
+
+  RunnableType runnable_;
+  P1 p1_;
+  P2 p2_;
+};
+
+template <typename Runnable, typename RunType, typename P1, typename P2,
+    typename P3>
+struct BindState<Runnable, RunType, void(P1, P2, P3)> : public BindStateBase {
+  typedef Runnable RunnableType;
+  typedef IsWeakMethod<HasIsMethodTag<Runnable>::value, P1> IsWeakCall;
+  typedef Invoker<3, BindState, RunType> InvokerType;
+  typedef typename InvokerType::UnboundRunType UnboundRunType;
+
+  // Convenience typedefs for bound argument types.
+  typedef UnwrapTraits<P1> Bound1UnwrapTraits;
+  typedef UnwrapTraits<P2> Bound2UnwrapTraits;
+  typedef UnwrapTraits<P3> Bound3UnwrapTraits;
+
+  BindState(const Runnable& runnable, const P1& p1, const P2& p2, const P3& p3)
+      : runnable_(runnable),
+        p1_(p1),
+        p2_(p2),
+        p3_(p3) {
+    MaybeRefcount<HasIsMethodTag<Runnable>::value, P1>::AddRef(p1_);
+  }
+
+  virtual ~BindState() {    MaybeRefcount<HasIsMethodTag<Runnable>::value,
+      P1>::Release(p1_);  }
+
+  RunnableType runnable_;
+  P1 p1_;
+  P2 p2_;
+  P3 p3_;
+};
+
+template <typename Runnable, typename RunType, typename P1, typename P2,
+    typename P3, typename P4>
+struct BindState<Runnable, RunType, void(P1, P2, P3,
+    P4)> : public BindStateBase {
+  typedef Runnable RunnableType;
+  typedef IsWeakMethod<HasIsMethodTag<Runnable>::value, P1> IsWeakCall;
+  typedef Invoker<4, BindState, RunType> InvokerType;
+  typedef typename InvokerType::UnboundRunType UnboundRunType;
+
+  // Convenience typedefs for bound argument types.
+  typedef UnwrapTraits<P1> Bound1UnwrapTraits;
+  typedef UnwrapTraits<P2> Bound2UnwrapTraits;
+  typedef UnwrapTraits<P3> Bound3UnwrapTraits;
+  typedef UnwrapTraits<P4> Bound4UnwrapTraits;
+
+  BindState(const Runnable& runnable, const P1& p1, const P2& p2, const P3& p3,
+      const P4& p4)
+      : runnable_(runnable),
+        p1_(p1),
+        p2_(p2),
+        p3_(p3),
+        p4_(p4) {
+    MaybeRefcount<HasIsMethodTag<Runnable>::value, P1>::AddRef(p1_);
+  }
+
+  virtual ~BindState() {    MaybeRefcount<HasIsMethodTag<Runnable>::value,
+      P1>::Release(p1_);  }
+
+  RunnableType runnable_;
+  P1 p1_;
+  P2 p2_;
+  P3 p3_;
+  P4 p4_;
+};
+
+template <typename Runnable, typename RunType, typename P1, typename P2,
+    typename P3, typename P4, typename P5>
+struct BindState<Runnable, RunType, void(P1, P2, P3, P4,
+    P5)> : public BindStateBase {
+  typedef Runnable RunnableType;
+  typedef IsWeakMethod<HasIsMethodTag<Runnable>::value, P1> IsWeakCall;
+  typedef Invoker<5, BindState, RunType> InvokerType;
+  typedef typename InvokerType::UnboundRunType UnboundRunType;
+
+  // Convenience typedefs for bound argument types.
+  typedef UnwrapTraits<P1> Bound1UnwrapTraits;
+  typedef UnwrapTraits<P2> Bound2UnwrapTraits;
+  typedef UnwrapTraits<P3> Bound3UnwrapTraits;
+  typedef UnwrapTraits<P4> Bound4UnwrapTraits;
+  typedef UnwrapTraits<P5> Bound5UnwrapTraits;
+
+  BindState(const Runnable& runnable, const P1& p1, const P2& p2, const P3& p3,
+      const P4& p4, const P5& p5)
+      : runnable_(runnable),
+        p1_(p1),
+        p2_(p2),
+        p3_(p3),
+        p4_(p4),
+        p5_(p5) {
+    MaybeRefcount<HasIsMethodTag<Runnable>::value, P1>::AddRef(p1_);
+  }
+
+  virtual ~BindState() {    MaybeRefcount<HasIsMethodTag<Runnable>::value,
+      P1>::Release(p1_);  }
+
+  RunnableType runnable_;
+  P1 p1_;
+  P2 p2_;
+  P3 p3_;
+  P4 p4_;
+  P5 p5_;
+};
+
+template <typename Runnable, typename RunType, typename P1, typename P2,
+    typename P3, typename P4, typename P5, typename P6>
+struct BindState<Runnable, RunType, void(P1, P2, P3, P4, P5,
+    P6)> : public BindStateBase {
+  typedef Runnable RunnableType;
+  typedef IsWeakMethod<HasIsMethodTag<Runnable>::value, P1> IsWeakCall;
+  typedef Invoker<6, BindState, RunType> InvokerType;
+  typedef typename InvokerType::UnboundRunType UnboundRunType;
+
+  // Convenience typedefs for bound argument types.
+  typedef UnwrapTraits<P1> Bound1UnwrapTraits;
+  typedef UnwrapTraits<P2> Bound2UnwrapTraits;
+  typedef UnwrapTraits<P3> Bound3UnwrapTraits;
+  typedef UnwrapTraits<P4> Bound4UnwrapTraits;
+  typedef UnwrapTraits<P5> Bound5UnwrapTraits;
+  typedef UnwrapTraits<P6> Bound6UnwrapTraits;
+
+  BindState(const Runnable& runnable, const P1& p1, const P2& p2, const P3& p3,
+      const P4& p4, const P5& p5, const P6& p6)
+      : runnable_(runnable),
+        p1_(p1),
+        p2_(p2),
+        p3_(p3),
+        p4_(p4),
+        p5_(p5),
+        p6_(p6) {
+    MaybeRefcount<HasIsMethodTag<Runnable>::value, P1>::AddRef(p1_);
+  }
+
+  virtual ~BindState() {    MaybeRefcount<HasIsMethodTag<Runnable>::value,
+      P1>::Release(p1_);  }
+
+  RunnableType runnable_;
+  P1 p1_;
+  P2 p2_;
+  P3 p3_;
+  P4 p4_;
+  P5 p5_;
+  P6 p6_;
+};
+
+template <typename Runnable, typename RunType, typename P1, typename P2,
+    typename P3, typename P4, typename P5, typename P6, typename P7>
+struct BindState<Runnable, RunType, void(P1, P2, P3, P4, P5, P6,
+    P7)> : public BindStateBase {
+  typedef Runnable RunnableType;
+  typedef IsWeakMethod<HasIsMethodTag<Runnable>::value, P1> IsWeakCall;
+  typedef Invoker<7, BindState, RunType> InvokerType;
+  typedef typename InvokerType::UnboundRunType UnboundRunType;
+
+  // Convenience typedefs for bound argument types.
+  typedef UnwrapTraits<P1> Bound1UnwrapTraits;
+  typedef UnwrapTraits<P2> Bound2UnwrapTraits;
+  typedef UnwrapTraits<P3> Bound3UnwrapTraits;
+  typedef UnwrapTraits<P4> Bound4UnwrapTraits;
+  typedef UnwrapTraits<P5> Bound5UnwrapTraits;
+  typedef UnwrapTraits<P6> Bound6UnwrapTraits;
+  typedef UnwrapTraits<P7> Bound7UnwrapTraits;
+
+  BindState(const Runnable& runnable, const P1& p1, const P2& p2, const P3& p3,
+      const P4& p4, const P5& p5, const P6& p6, const P7& p7)
+      : runnable_(runnable),
+        p1_(p1),
+        p2_(p2),
+        p3_(p3),
+        p4_(p4),
+        p5_(p5),
+        p6_(p6),
+        p7_(p7) {
+    MaybeRefcount<HasIsMethodTag<Runnable>::value, P1>::AddRef(p1_);
+  }
+
+  virtual ~BindState() {    MaybeRefcount<HasIsMethodTag<Runnable>::value,
+      P1>::Release(p1_);  }
+
+  RunnableType runnable_;
+  P1 p1_;
+  P2 p2_;
+  P3 p3_;
+  P4 p4_;
+  P5 p5_;
+  P6 p6_;
+  P7 p7_;
+};
+
+}  // namespace internal
+}  // namespace base
+
+#endif  // BASE_BIND_INTERNAL_H_