Cleaned up the WebRtcAudioCapturer a bit.

content/renderer/media/mock_media_stream_dependency_factory.h

Index: content/renderer/media/mock_media_stream_dependency_factory.h
diff --git a/content/renderer/media/mock_media_stream_dependency_factory.h b/content/renderer/media/mock_media_stream_dependency_factory.h
index bd73ec7bd9b9539342d059152928635b16257988..7099cf35d86c97b2de091ca1d341ff260f102c48 100644
--- a/content/renderer/media/mock_media_stream_dependency_factory.h
+++ b/content/renderer/media/mock_media_stream_dependency_factory.h
@@ -157,8 +157,9 @@ class MockMediaStreamDependencyFactory : public MediaStreamDependencyFactory {
   virtual bool EnsurePeerConnectionFactory() OVERRIDE;
   virtual bool PeerConnectionFactoryCreated() OVERRIDE;
 
-  virtual scoped_refptr<WebRtcAudioCapturer> MaybeCreateAudioCapturer(
-      int render_view_id, const StreamDeviceInfo& device_info) OVERRIDE;
+  virtual scoped_refptr<WebRtcAudioCapturer> CreateAudioCapturer(
+      int render_view_id, const StreamDeviceInfo& device_info,
+      WebRtcAudioDeviceImpl* audio_device) OVERRIDE;
 
   MockAudioSource* last_audio_source() { return last_audio_source_.get(); }
   MockVideoSource* last_video_source() { return last_video_source_.get(); }