MediaStream audio object graph untangling and clean-ups.

content/renderer/media/webrtc/peer_connection_dependency_factory.h

Index: content/renderer/media/webrtc/peer_connection_dependency_factory.h
diff --git a/content/renderer/media/webrtc/peer_connection_dependency_factory.h b/content/renderer/media/webrtc/peer_connection_dependency_factory.h
index 212eefb20d2ed70cfc54ba1c040b5242b5405b23..5b1b6527f9ece94889f049329e8c1cfe38a3d394 100644
--- a/content/renderer/media/webrtc/peer_connection_dependency_factory.h
+++ b/content/renderer/media/webrtc/peer_connection_dependency_factory.h
@@ -152,9 +152,9 @@ class CONTENT_EXPORT PeerConnectionDependencyFactory
   // Creates a media::AudioCapturerSource with an implementation that is
   // specific for a WebAudio source. The created WebAudioCapturerSource
   // instance will function as audio source instead of the default
-  // WebRtcAudioCapturer.
-  virtual scoped_refptr<WebAudioCapturerSource> CreateWebAudioSource(
-      blink::WebMediaStreamSource* source);
+  // WebRtcAudioCapturer. Ownership of the new WebAudioCapturerSource is
+  // transferred to |source|.
+  virtual void CreateWebAudioSource(blink::WebMediaStreamSource* source);
 
   // Asks the PeerConnection factory to create a Local VideoTrack object with
   // the video source using |capturer|.
@@ -169,17 +169,12 @@ class CONTENT_EXPORT PeerConnectionDependencyFactory
   // Returns a new capturer or existing capturer based on the |render_frame_id|
   // and |device_info|; if both are valid, it reuses existing capture if any --
   // otherwise it creates a new capturer.
-  virtual scoped_refptr<WebRtcAudioCapturer> CreateAudioCapturer(
+  virtual scoped_ptr<WebRtcAudioCapturer> CreateAudioCapturer(
       int render_frame_id,
       const StreamDeviceInfo& device_info,
       const blink::WebMediaConstraints& constraints,
       MediaStreamAudioSource* audio_source);
 
-  // Adds the audio device as a sink to the audio track and starts the local
-  // audio track. This is virtual for test purposes since no real audio device
-  // exist in unit tests.
-  virtual void StartLocalAudioTrack(WebRtcLocalAudioTrack* audio_track);
-
  private:
   // Implement base::MessageLoop::DestructionObserver.
   // This makes sure the libjingle PeerConnectionFactory is released before