diff -r 000000000000 -r 6474c204b198 dom/audiochannel/AudioChannelAgent.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/audiochannel/AudioChannelAgent.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,67 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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_audio_channel_agent_h__
+#define mozilla_dom_audio_channel_agent_h__
+
+#include "nsIAudioChannelAgent.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsCOMPtr.h"
+#include "nsWeakPtr.h"
+
+#define NS_AUDIOCHANNELAGENT_CONTRACTID "@mozilla.org/audiochannelagent;1"
+// f27688e2-3dd7-11e2-904e-10bf48d64bd4
+#define NS_AUDIOCHANNELAGENT_CID {0xf27688e2, 0x3dd7, 0x11e2, \
+      {0x90, 0x4e, 0x10, 0xbf, 0x48, 0xd6, 0x4b, 0xd4}}
+
+class nsIDOMWindow;
+
+namespace mozilla {
+namespace dom {
+
+/* Header file */
+class AudioChannelAgent : public nsIAudioChannelAgent
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_NSIAUDIOCHANNELAGENT
+
+  NS_DECL_CYCLE_COLLECTION_CLASS(AudioChannelAgent)
+
+  AudioChannelAgent();
+  virtual void NotifyAudioChannelStateChanged();
+
+  void WindowVolumeChanged();
+
+  nsIDOMWindow* Window() const
+  {
+    return mWindow;
+  }
+
+private:
+  virtual ~AudioChannelAgent();
+
+  // Returns mCallback if that's non-null, or otherwise tries to get an
+  // nsIAudioChannelAgentCallback out of mWeakCallback.
+  already_AddRefed<nsIAudioChannelAgentCallback> GetCallback();
+
+  nsresult InitInternal(nsIDOMWindow* aWindow, int32_t aAudioAgentType,
+                        nsIAudioChannelAgentCallback* aCallback,
+                        bool aUseWeakRef, bool aWithVideo=false);
+
+  nsCOMPtr<nsIDOMWindow> mWindow;
+  nsCOMPtr<nsIAudioChannelAgentCallback> mCallback;
+  nsWeakPtr mWeakCallback;
+  int32_t mAudioChannelType;
+  bool mIsRegToService;
+  bool mVisible;
+  bool mWithVideo;
+};
+
+} // namespace dom
+} // namespace mozilla
+#endif
+