Add video frame refresh to MediaStream and VideoCapture stacks.

content/renderer/media/media_stream_video_renderer_sink.cc

 // Copyright (c) 2012 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_renderer_sink.h"
 
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "media/base/bind_to_current_loop.h"
@@ skipping 32 matching lines @@
   if (gpu_memory_buffer_pool_) {
     media_task_runner_->DeleteSoon(FROM_HERE,
                                    gpu_memory_buffer_pool_.release());
   }
 }
 
 void MediaStreamVideoRendererSink::Start() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK_EQ(state_, STOPPED);
 
-  AddToVideoTrack(
-      this,
+  MediaStreamVideoSink::ConnectToTrack(video_track_,
       media::BindToCurrentLoop(
           base::Bind(
               &MediaStreamVideoRendererSink::OnVideoFrame,
-              weak_factory_.GetWeakPtr())),
-      video_track_);
+              weak_factory_.GetWeakPtr())));
   state_ = STARTED;
 
   if (video_track_.source().getReadyState() ==
           blink::WebMediaStreamSource::ReadyStateEnded ||
       !video_track_.isEnabled()) {
     RenderSignalingFrame();
   }
 }
 
 void MediaStreamVideoRendererSink::Stop() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(state_ == STARTED || state_ == PAUSED);
-  RemoveFromVideoTrack(this, video_track_);
+  MediaStreamVideoSink::DisconnectFromTrack();
   weak_factory_.InvalidateWeakPtrs();
   state_ = STOPPED;
   frame_size_.set_width(kMinFrameSize);
   frame_size_.set_height(kMinFrameSize);
 }
 
 void MediaStreamVideoRendererSink::Play() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   if (state_ == PAUSED)
     state_ = STARTED;
@@ skipping 65 matching lines @@
   scoped_refptr<media::VideoFrame> video_frame =
       media::VideoFrame::CreateBlackFrame(frame_size_);
   video_frame->metadata()->SetBoolean(media::VideoFrameMetadata::END_OF_STREAM,
                                       true);
   video_frame->metadata()->SetTimeTicks(
       media::VideoFrameMetadata::REFERENCE_TIME, base::TimeTicks::Now());
   OnVideoFrame(video_frame, base::TimeTicks());
 }
 
 }  // namespace content