VideoTrackAdapter: Add passing frames monitor, notify MSVCS -> MSVTrack(s)

content/renderer/media/media_stream_video_capturer_source.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_VIDEO_CAPTURER_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
 
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 52 matching lines @@
   void OnDeviceSupportedFormatsEnumerated(
       const media::VideoCaptureFormats& formats);
 
   // The id identifies which video capture device is used for this video
   // capture session.
   media::VideoCaptureSessionId session_id_;
   base::Closure release_device_cb_;
   base::Closure stop_capture_cb_;
 
   bool is_screen_cast_;
-  bool got_first_frame_;
 
   // |running_callback| is provided to this class in StartCapture and must be
   // valid until StopCapture is called.
   RunningCallback running_callback_;
 
   VideoCaptureDeviceFormatsCB source_formats_callback_;
 
   // Bound to the render thread.
   base::ThreadChecker thread_checker_;
 
@@ skipping 30 matching lines @@
  private:
   // The delegate that provides video frames.
   scoped_refptr<VideoCapturerDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoCapturerSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_