Plumb render view ID from audio-related code in renderer through IPCs to AudioRendererHost in brows…

media/audio/audio_output_device.h

Index: media/audio/audio_output_device.h
diff --git a/media/audio/audio_output_device.h b/media/audio/audio_output_device.h
index fe4459cc5018d411041b39c49a3e4f35a90187e6..24923e4d2a02787ad3d01dd8eaa3251e97560e7e 100644
--- a/media/audio/audio_output_device.h
+++ b/media/audio/audio_output_device.h
@@ -98,9 +98,7 @@ class MEDIA_EXPORT AudioOutputDevice
   virtual void OnIPCClosed() OVERRIDE;
 
   // Creates an uninitialized AudioOutputDevice. Clients must call Initialize()
-  // before using.
-  // TODO(tommi): When all dependencies on |content| have been removed
-  // from AudioOutputDevice, move this class over to media/audio.
+  // before using.  Takes ownership of |ipc|.
   AudioOutputDevice(AudioOutputIPC* ipc,
                     const scoped_refptr<base::MessageLoopProxy>& io_loop);
 
@@ -136,7 +134,7 @@ class MEDIA_EXPORT AudioOutputDevice
 
   // A pointer to the IPC layer that takes care of sending requests over to
   // the AudioRendererHost.
-  AudioOutputIPC* ipc_;
+  scoped_ptr<AudioOutputIPC> ipc_;
 
   // Our stream ID on the message filter. Only accessed on the IO thread.
   // Must only be modified on the IO thread.