Change MediaStreamVideoSource to output different resolutions to different tracks depending on the …

content/renderer/media/media_stream_video_track.cc

 // Copyright 2013 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.
 
 #include "content/renderer/media/media_stream_video_track.h"
 
 #include "base/bind.h"
 #include "content/renderer/media/video_frame_deliverer.h"
 #include "media/base/bind_to_current_loop.h"
 
@@ skipping 47 matching lines @@
     if (!enabled_)
       return;
     VideoFrameDeliverer::DeliverFrameOnIO(frame, format);
   }
 
   const std::vector<MediaStreamVideoSink*>& sinks() const { return sinks_; }
 
  protected:
   virtual ~FrameDeliverer() {
     DCHECK(sinks_.empty());
+    DCHECK(thread_checker().CalledOnValidThread());
   }
 
   void SetEnabledOnIO(bool enabled) {
     DCHECK(io_message_loop()->BelongsToCurrentThread());
     enabled_ = enabled;
   }
 
  private:
   // The below members are used on the main render thread.
   std::vector<MediaStreamVideoSink*> sinks_;
@@ skipping 37 matching lines @@
       constraints_(constraints),
       source_(source) {
   source->AddTrack(this,
                    base::Bind(
                        &MediaStreamVideoTrack::FrameDeliverer::DeliverFrameOnIO,
                        frame_deliverer_),
                    constraints, callback);
 }
 
 MediaStreamVideoTrack::~MediaStreamVideoTrack() {
+  DCHECK(thread_checker_.CalledOnValidThread());
   Stop();
   DVLOG(3) << "~MediaStreamVideoTrack()";
 }
 
 void MediaStreamVideoTrack::AddSink(
     MediaStreamVideoSink* sink, const VideoCaptureDeliverFrameCB& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   frame_deliverer_->AddSink(sink, callback);
 }
 
@@ skipping 27 matching lines @@
     blink::WebMediaStreamSource::ReadyState state) {
   DCHECK(thread_checker_.CalledOnValidThread());
   const std::vector<MediaStreamVideoSink*>& sinks = frame_deliverer_->sinks();
   for (std::vector<MediaStreamVideoSink*>::const_iterator it = sinks.begin();
        it != sinks.end(); ++it) {
     (*it)->OnReadyStateChanged(state);
   }
 }
 
 }  // namespace content