Part 1: Plumb render view ID to render host

media/audio/audio_output_ipc.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_
 #define MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_
 
 #include "base/shared_memory.h"
 #include "base/sync_socket.h"
 #include "media/audio/audio_parameters.h"
@@ skipping 39 matching lines @@
  protected:
   virtual ~AudioOutputIPCDelegate();
 };
 
 // Provides IPC functionality for an AudioOutputDevice.  The implementation
 // should asynchronously deliver the messages to an AudioOutputController object
 // (or create one in the case of CreateStream()), that may live in a separate
 // process.
 class MEDIA_EXPORT AudioOutputIPC {
  public:
+  virtual ~AudioOutputIPC();
+
   // Registers an AudioOutputIPCDelegate and returns a |stream_id| that must
   // be used with all other IPC functions in this interface.
   virtual int AddDelegate(AudioOutputIPCDelegate* delegate) = 0;
 
   // Unregisters a delegate that was previously registered via a call to
   // AddDelegate().  The audio stream should be in a closed state prior to
   // calling this function.
   virtual void RemoveDelegate(int stream_id) = 0;
 
   // Sends a request to create an AudioOutputController object in the peer
@@ skipping 16 matching lines @@
   // TODO(tommi): This is currently neither implemented nor called.  Remove?
   virtual void FlushStream(int stream_id) = 0;
 
   // Closes the audio stream and deletes the matching AudioOutputController
   // instance.  Prior to deleting the AudioOutputController object, a call to
   // AudioOutputController::Close must be made.
   virtual void CloseStream(int stream_id) = 0;
 
   // Sets the volume of the audio stream.
   virtual void SetVolume(int stream_id, double volume) = 0;
-
- protected:
-  virtual ~AudioOutputIPC();
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_