Merge AssociateStreamWithProducer message into CreateStream message for both audio output and input.

content/renderer/media/audio_device_factory.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 CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_
 #define CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 
 namespace media {
 class AudioInputDevice;
+class AudioOutputDevice;
 }
 
 namespace content {
 
-class RendererAudioOutputDevice;
-
-// A factory for creating RendererAudioOutputDevices.  There is a global factory
-// function that can be installed for the purposes of testing to provide
-// a specialized AudioRendererSink class.
+// A factory for creating AudioOutputDevices and AudioInputDevices.  There is a
+// global factory function that can be installed for the purposes of testing to
+// provide specialized implementations.
 class AudioDeviceFactory {
  public:
-  // Creates a RendererAudioOutputDevice using the currently registered factory.
-  static scoped_refptr<RendererAudioOutputDevice> NewOutputDevice();
+  // Creates a AudioOutputDevice using the currently registered factory.

[palmer, 2013/03/05 21:09:32]

NIT: Creates "an"

[miu, 2013/03/06 22:36:52]

Done.

+  // |render_view_id| refers to the render view containing the entity producing
+  // the audio.
+  static scoped_refptr<media::AudioOutputDevice> NewOutputDevice(
+      int render_view_id);
 
-  // Creates an AudioInputDevice using the currently registered factory,
-  static scoped_refptr<media::AudioInputDevice> NewInputDevice();
+  // Creates an AudioInputDevice using the currently registered factory.
+  // |render_view_id| refers to the render view containing the entity consuming
+  // the audio.
+  static scoped_refptr<media::AudioInputDevice> NewInputDevice(
+      int render_view_id);
 
  protected:
   AudioDeviceFactory();
   virtual ~AudioDeviceFactory();
 
   // You can derive from this class and specify an implementation for these
   // functions to provide alternate audio device implementations.
   // If the return value of either of these function is NULL, we fall back
   // on the default implementation.
-  virtual RendererAudioOutputDevice* CreateOutputDevice() = 0;
-  virtual media::AudioInputDevice* CreateInputDevice() = 0;
+  virtual media::AudioOutputDevice* CreateOutputDevice(int render_view_id) = 0;
+  virtual media::AudioInputDevice* CreateInputDevice(int render_view_id) = 0;
 
  private:
   // The current globally registered factory. This is NULL when we should
   // create the default AudioRendererSinks.
   static AudioDeviceFactory* factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDeviceFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_