Add generic interfaces for the sinks of the media stream audio track

content/renderer/media/media_stream_impl.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_MEDIA_STREAM_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 171 matching lines @@
   void StopUnreferencedSources(bool notify_dispatcher);
 
   scoped_refptr<VideoFrameProvider>
   CreateVideoFrameProvider(
       webrtc::MediaStreamInterface* stream,
       const base::Closure& error_cb,
       const VideoFrameProvider::RepaintCB& repaint_cb);
   scoped_refptr<WebRtcAudioRenderer> CreateRemoteAudioRenderer(
       webrtc::MediaStreamInterface* stream);
   scoped_refptr<WebRtcLocalAudioRenderer> CreateLocalAudioRenderer(
-      webrtc::MediaStreamInterface* stream);
+      const blink::WebMediaStreamTrack& audio_track);
 
   // Returns a valid session id if a single capture device is currently open
   // (and then the matching session_id), otherwise -1.
   // This is used to pass on a session id to a webrtc audio renderer (either
   // local or remote), so that audio will be rendered to a matching output
   // device, should one exist.
   // Note that if there are more than one open capture devices the function
   // will not be able to pick an appropriate device and return false.
   bool GetAuthorizedDeviceInfoForAudioRenderer(
       int* session_id, int* output_sample_rate, int* output_buffer_size);
 
   // Weak ref to a MediaStreamDependencyFactory, owned by the RenderThread.
   // It's valid for the lifetime of RenderThread.
   MediaStreamDependencyFactory* dependency_factory_;
 
   // media_stream_dispatcher_ is a weak reference, owned by RenderView. It's
   // valid for the lifetime of RenderView.
   MediaStreamDispatcher* media_stream_dispatcher_;
 
   UserMediaRequests user_media_requests_;
 
   LocalStreamSources local_sources_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_IMPL_H_