Split libjingle's signaling thread from the UI thread

content/renderer/media/media_stream_track.h

 // Copyright 2014 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_TRACK_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_TRACK_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
 
 namespace webrtc {
 class AudioTrackInterface;
 class MediaStreamTrackInterface;
 }  // namespace webrtc
 
 namespace content {
 
 // MediaStreamTrack is a Chrome representation of blink::WebMediaStreamTrack.
 // It is owned by blink::WebMediaStreamTrack as
 // blink::WebMediaStreamTrack::ExtraData.
 class CONTENT_EXPORT MediaStreamTrack
     : NON_EXPORTED_BASE(public blink::WebMediaStreamTrack::ExtraData) {
  public:
-  MediaStreamTrack(
-      const scoped_refptr<webrtc::MediaStreamTrackInterface>& track,
-      bool is_local_track);
+  explicit MediaStreamTrack(bool is_local_track);
   virtual ~MediaStreamTrack();
 
   static MediaStreamTrack* GetTrack(
       const blink::WebMediaStreamTrack& track);
 
-  // If a subclass overrides this method it has to call the base class.
-  virtual void SetEnabled(bool enabled);
+  virtual void SetEnabled(bool enabled) = 0;
 
   // TODO(xians): Make this pure virtual when Stop[Track] has been

[perkj_chrome, 2014/10/31 08:37:24]

nit: remove this todo or move it to the new implementation.

[tommi (sloooow) - chröme, 2014/10/31 10:06:32]

Done.

   // implemented for remote audio tracks.
-  virtual void Stop();
+  virtual void Stop() = 0;
 
+  // TODO(tommi, xians): Remove this method.
   virtual webrtc::AudioTrackInterface* GetAudioAdapter();
 
   bool is_local_track() const { return is_local_track_; }
 
  protected:
-  const scoped_refptr<webrtc::MediaStreamTrackInterface> track_;
-
- private:
   const bool is_local_track_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamTrack);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_TRACK_H_