diff -r 000000000000 -r 6474c204b198 js/ductwork/debugger/JSDebugger.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/ductwork/debugger/JSDebugger.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,87 @@
+/* -*-  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/. */
+
+#include "JSDebugger.h"
+#include "nsIXPConnect.h"
+#include "nsThreadUtils.h"
+#include "jsapi.h"
+#include "jsfriendapi.h"
+#include "jswrapper.h"
+#include "js/OldDebugAPI.h"
+#include "mozilla/ModuleUtils.h"
+#include "nsServiceManagerUtils.h"
+#include "nsMemory.h"
+
+#define JSDEBUGGER_CONTRACTID \
+  "@mozilla.org/jsdebugger;1"
+
+#define JSDEBUGGER_CID \
+{ 0x0365cbd5, 0xd46e, 0x4e94, { 0xa3, 0x9f, 0x83, 0xb6, 0x3c, 0xd1, 0xa9, 0x63 } }
+
+namespace mozilla {
+namespace jsdebugger {
+
+NS_GENERIC_FACTORY_CONSTRUCTOR(JSDebugger)
+
+NS_IMPL_ISUPPORTS(JSDebugger, IJSDebugger)
+
+JSDebugger::JSDebugger()
+{
+}
+
+JSDebugger::~JSDebugger()
+{
+}
+
+NS_IMETHODIMP
+JSDebugger::AddClass(JS::Handle<JS::Value> global, JSContext* cx)
+{
+  nsresult rv;
+  nsCOMPtr<nsIXPConnect> xpc = do_GetService(nsIXPConnect::GetCID(), &rv);
+
+  if (!global.isObject()) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  JS::RootedObject obj(cx, &global.toObject());
+  obj = js::UncheckedUnwrap(obj, /* stopAtOuter = */ false);
+  if (!obj) {
+    return NS_ERROR_FAILURE;
+  }
+
+  JSAutoCompartment ac(cx, obj);
+  if (JS_GetGlobalForObject(cx, obj) != obj) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  if (!JS_DefineDebuggerObject(cx, obj)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+}
+}
+
+NS_DEFINE_NAMED_CID(JSDEBUGGER_CID);
+
+static const mozilla::Module::CIDEntry kJSDebuggerCIDs[] = {
+  { &kJSDEBUGGER_CID, false, nullptr, mozilla::jsdebugger::JSDebuggerConstructor },
+  { nullptr }
+};
+
+static const mozilla::Module::ContractIDEntry kJSDebuggerContracts[] = {
+  { JSDEBUGGER_CONTRACTID, &kJSDEBUGGER_CID },
+  { nullptr }
+};
+
+static const mozilla::Module kJSDebuggerModule = {
+  mozilla::Module::kVersion,
+  kJSDebuggerCIDs,
+  kJSDebuggerContracts
+};
+
+NSMODULE_DEFN(jsdebugger) = &kJSDebuggerModule;