MediaStream audio sourcing: Bypass audio processing for non-WebRTC cases.

content/renderer/media/webrtc_local_audio_source_provider.h

Index: content/renderer/media/webrtc_local_audio_source_provider.h
diff --git a/content/renderer/media/webrtc_local_audio_source_provider.h b/content/renderer/media/webrtc_local_audio_source_provider.h
index 9a9cc8e50aab457c2d7629a2a6282522447976bb..65b0a73f12046f62f4abd903e6f0d31895f9f662 100644
--- a/content/renderer/media/webrtc_local_audio_source_provider.h
+++ b/content/renderer/media/webrtc_local_audio_source_provider.h
@@ -35,15 +35,19 @@ class WebAudioSourceProviderClient;
 namespace content {
 
 // WebRtcLocalAudioSourceProvider provides a bridge between classes:
-//     WebRtcLocalAudioTrack ---> blink::WebAudioSourceProvider
+//     MediaStreamAudioTrack ---> blink::WebAudioSourceProvider
 //
-// WebRtcLocalAudioSourceProvider works as a sink to the WebRtcLocalAudioTrack
-// and store the capture data to a FIFO. When the media stream is connected to
+// WebRtcLocalAudioSourceProvider works as a sink to the MediaStreamAudioTrack
+// and stores the capture data to a FIFO. When the media stream is connected to
 // WebAudio MediaStreamAudioSourceNode as a source provider,
 // MediaStreamAudioSourceNode will periodically call provideInput() to get the
 // data from the FIFO.
 //
 // All calls are protected by a lock.
+//
+// TODO(miu): This class should be renamed to WebAudioMediaStreamSink since it
+// works with all media stream tracks and there is nothing specific to WebRTC
+// here.
 class CONTENT_EXPORT WebRtcLocalAudioSourceProvider
     :  NON_EXPORTED_BASE(public blink::WebAudioSourceProvider),
        NON_EXPORTED_BASE(public media::AudioConverter::InputCallback),