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

media/audio/audio_output_device.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.
 //
 // Audio rendering unit utilizing audio output stream provided by browser
 // process through IPC.
 //
 // Relationship of classes.
 //
 //  AudioOutputController                AudioOutputDevice
@@ skipping 81 matching lines @@
   // Methods called on IO thread ----------------------------------------------
   // AudioOutputIPCDelegate methods.
   virtual void OnStateChanged(AudioOutputIPCDelegate::State state) OVERRIDE;
   virtual void OnStreamCreated(base::SharedMemoryHandle handle,
                                base::SyncSocket::Handle socket_handle,
                                int length) OVERRIDE;
   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.
-  AudioOutputDevice(AudioOutputIPC* ipc,
+  AudioOutputDevice(scoped_ptr<AudioOutputIPC> ipc,
                     const scoped_refptr<base::MessageLoopProxy>& io_loop);
 
  protected:
   // Magic required by ref_counted.h to avoid any code deleting the object
   // accidentally while there are references to it.
   friend class base::RefCountedThreadSafe<AudioOutputDevice>;
   virtual ~AudioOutputDevice();
 
  private:
   // Methods called on IO thread ----------------------------------------------
@@ skipping 14 matching lines @@
   AudioParameters audio_parameters_;
 
   // The number of optional synchronized input channels having the same
   // sample-rate and buffer-size as specified in audio_parameters_.
   int input_channels_;
 
   RenderCallback* callback_;
 
   // 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.
   int stream_id_;
 
   // State of Play() / Pause() calls before OnStreamCreated() is called.
   bool play_on_start_;
 
   // Set to |true| when OnStreamCreated() is called.
   // Set to |false| when ShutDownOnIOThread() is called.
@@ skipping 17 matching lines @@
   // TODO(scherkus): Replace this by changing AudioRendererSink to either accept
   // the callback via Start(). See http://crbug.com/151051 for details.
   bool stopping_hack_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioOutputDevice);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_OUTPUT_DEVICE_H_