MediaStream audio object graph untangling and clean-ups.

content/renderer/media/webrtc/media_stream_remote_audio_track.h

 // Copyright 2015 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_WEBRTC_MEDIA_STREAM_REMOTE_AUDIO_TRACK_H_
 #define CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_AUDIO_TRACK_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
 #include "content/renderer/media/media_stream_audio_track.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
 
 namespace content {
 
 class MediaStreamRemoteAudioSource;
 
 // MediaStreamRemoteAudioTrack is a WebRTC specific implementation of an
 // audio track received from a PeerConnection.
 // TODO(tommi): Chrome shouldn't have to care about remote vs local so
 // we should have a single track implementation that delegates to the
 // sources that do different things depending on the type of source.
 class MediaStreamRemoteAudioTrack : public MediaStreamAudioTrack {
  public:
   explicit MediaStreamRemoteAudioTrack(
       const blink::WebMediaStreamSource& source, bool enabled);
   ~MediaStreamRemoteAudioTrack() override;
 
+  // MediaStreamTrack overrides.
   void SetEnabled(bool enabled) override;
-  void Stop() override;
+  void Stop() final;
 
+  // MediaStreamAudioTrack overrides.
   void AddSink(MediaStreamAudioSink* sink) override;
   void RemoveSink(MediaStreamAudioSink* sink) override;
   media::AudioParameters GetOutputFormat() const override;
 
   webrtc::AudioTrackInterface* GetAudioAdapter() override;
 
  private:
   MediaStreamRemoteAudioSource* source() const;
 
   blink::WebMediaStreamSource source_;
   bool enabled_;
 };
 
 // Inheriting from ExtraData directly since MediaStreamAudioSource has
 // too much unrelated bloat.
 // TODO(tommi): MediaStreamAudioSource needs refactoring.
+// TODO(miu): On it!  ;-)
 class MediaStreamRemoteAudioSource
     : public blink::WebMediaStreamSource::ExtraData {
  public:
   explicit MediaStreamRemoteAudioSource(
       const scoped_refptr<webrtc::AudioTrackInterface>& track);
   ~MediaStreamRemoteAudioSource() override;
 
   // Controls whether or not the source is included in the main, mixed, audio
   // output from WebRTC as rendered by WebRtcAudioRenderer (media players).
   void SetEnabledForMixing(bool enabled);
@@ skipping 18 matching lines @@
  private:
   class AudioSink;
   scoped_ptr<AudioSink> sink_;
   const scoped_refptr<webrtc::AudioTrackInterface> track_;
   base::ThreadChecker thread_checker_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_AUDIO_TRACK_H_