Connect the new video rendering path to the compositor.

media/base/null_video_sink.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 MEDIA_AUDIO_NULL_VIDEO_SINK_H_
 #define MEDIA_AUDIO_NULL_VIDEO_SINK_H_
 
 #include "base/cancelable_callback.h"
 #include "base/md5.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 32 matching lines @@
 
   void set_tick_clock_for_testing(base::TickClock* tick_clock) {
     tick_clock_ = tick_clock;
   }
 
   // Sets |stop_cb_|, which will be fired when Stop() is called.
   void set_stop_cb(const base::Closure& stop_cb) {
     stop_cb_ = stop_cb;
   }
 
+  bool is_started() const { return started_; }
+
  private:
   // Task that periodically calls Render() to consume video data.
   void CallRender();
 
   const bool clockless_;
   const base::TimeDelta interval_;
   const NewFrameCB new_frame_cb_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   bool started_;
@@ skipping 21 matching lines @@
 
   // If set, called when Stop() is called.
   base::Closure stop_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(NullVideoSink);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_NULL_VIDEO_SINK_H_