diff -r 000000000000 -r 6474c204b198 dom/base/DOMException.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/DOMException.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,162 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_DOMException_h__
+#define mozilla_dom_DOMException_h__
+
+// We intentionally shadow non-virtual methods, but gcc gets confused.
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Woverloaded-virtual"
+#endif
+
+#include <stdint.h>
+#include "jspubtd.h"
+#include "js/GCAPI.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsID.h"
+#include "nsIDOMDOMException.h"
+#include "nsWrapperCache.h"
+#include "xpcexception.h"
+#include "nsString.h"
+
+class nsIStackFrame;
+class nsString;
+
+nsresult
+NS_GetNameAndMessageForDOMNSResult(nsresult aNSResult, nsACString& aName,
+                                   nsACString& aMessage,
+                                   uint16_t* aCode = nullptr);
+
+namespace mozilla {
+namespace dom {
+
+#define MOZILLA_EXCEPTION_IID \
+{ 0x55eda557, 0xeba0, 0x4fe3, \
+  { 0xae, 0x2e, 0xf3, 0x94, 0x49, 0x23, 0x62, 0xd6 } }
+
+class Exception : public nsIXPCException,
+                  public nsWrapperCache
+{
+public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(MOZILLA_EXCEPTION_IID)
+
+  NS_DEFINE_STATIC_CID_ACCESSOR(NS_XPCEXCEPTION_CID)
+
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Exception)
+  
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_NSIEXCEPTION
+  NS_DECL_NSIXPCEXCEPTION
+
+  // Cruft used by XPConnect for exceptions originating in JS implemented
+  // components.
+  bool StealJSVal(JS::Value* aVp);
+  void StowJSVal(JS::Value& aVp);
+
+  // WebIDL API
+  virtual JSObject* WrapObject(JSContext* cx)
+    MOZ_OVERRIDE;
+
+  nsISupports* GetParentObject() const { return nullptr; }
+
+  void GetMessageMoz(nsString& retval);
+
+  uint32_t Result() const;
+
+  void GetName(nsString& retval);
+
+  // The XPCOM GetFilename does the right thing.
+
+  uint32_t LineNumber() const;
+
+  uint32_t ColumnNumber() const;
+
+  already_AddRefed<nsIStackFrame> GetLocation() const;
+
+  already_AddRefed<nsISupports> GetInner() const;
+
+  already_AddRefed<nsISupports> GetData() const;
+
+  void Stringify(nsString& retval);
+
+  // XPCOM factory ctor.
+  Exception();
+
+  Exception(const nsACString& aMessage,
+            nsresult aResult,
+            const nsACString& aName,
+            nsIStackFrame *aLocation,
+            nsISupports *aData);
+
+protected:
+  virtual ~Exception();
+
+  nsCString       mMessage;
+  nsresult        mResult;
+  nsCString       mName;
+  nsCOMPtr<nsIStackFrame> mLocation;
+  nsCOMPtr<nsISupports> mData;
+  nsString        mFilename;
+  int             mLineNumber;
+  nsCOMPtr<nsIException> mInner;
+  bool            mInitialized;
+
+  bool mHoldingJSVal;
+  JS::Heap<JS::Value> mThrownJSVal;
+
+private:
+  static bool sEverMadeOneFromFactory;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(Exception, MOZILLA_EXCEPTION_IID)
+
+class DOMException : public Exception,
+                     public nsIDOMDOMException
+{
+public:
+  DOMException(nsresult aRv, const nsACString& aMessage,
+               const nsACString& aName, uint16_t aCode);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIDOMDOMEXCEPTION
+
+  // nsIException overrides
+  NS_IMETHOD ToString(nsACString& aReturn) MOZ_OVERRIDE;
+
+  // nsWrapperCache overrides
+  virtual JSObject* WrapObject(JSContext* aCx)
+    MOZ_OVERRIDE;
+
+  uint16_t Code() const {
+    return mCode;
+  }
+
+  // Intentionally shadow the nsXPCException version.
+  void GetMessageMoz(nsString& retval);
+  void GetName(nsString& retval);
+
+  static already_AddRefed<DOMException>
+  Create(nsresult aRv);
+
+protected:
+
+  virtual ~DOMException() {}
+
+  nsCString mName;
+  nsCString mMessage;
+
+  uint16_t mCode;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
+#endif