diff -r 000000000000 -r 6474c204b198 dom/base/MessageChannel.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/MessageChannel.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,72 @@
+
+/* -*- 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_MessageChannel_h
+#define mozilla_dom_MessageChannel_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsWrapperCache.h"
+#include "nsCOMPtr.h"
+
+class nsPIDOMWindow;
+
+namespace mozilla {
+namespace dom {
+
+class MessagePort;
+
+class MessageChannel MOZ_FINAL : public nsISupports
+                               , public nsWrapperCache
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(MessageChannel)
+
+  static bool PrefEnabled();
+
+public:
+  MessageChannel(nsPIDOMWindow* aWindow);
+
+  ~MessageChannel();
+
+  nsPIDOMWindow*
+  GetParentObject() const
+  {
+    return mWindow;
+  }
+
+  virtual JSObject*
+  WrapObject(JSContext* aCx) MOZ_OVERRIDE;
+
+  static already_AddRefed<MessageChannel>
+  Constructor(const GlobalObject& aGlobal, ErrorResult& aRv);
+
+  MessagePort*
+  Port1() const
+  {
+    return mPort1;
+  }
+
+  MessagePort*
+  Port2() const
+  {
+    return mPort2;
+  }
+
+private:
+  nsCOMPtr<nsPIDOMWindow> mWindow;
+
+  nsRefPtr<MessagePort> mPort1;
+  nsRefPtr<MessagePort> mPort2;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_MessageChannel_h