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

content/renderer/media/media_stream_video_capturer_source.cc

 // 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.
 
 #include "content/renderer/media/media_stream_video_capturer_source.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
@@ skipping 20 matching lines @@
 const int kVideoFrameRates[] = {30, 60};
 
 }  // namespace
 
 namespace content {
 
 VideoCapturerDelegate::VideoCapturerDelegate(
     const StreamDeviceInfo& device_info)
     : session_id_(device_info.session_id),
       is_screen_cast_(device_info.device.type == MEDIA_TAB_VIDEO_CAPTURE ||
-                      device_info.device.type == MEDIA_DESKTOP_VIDEO_CAPTURE),
-      got_first_frame_(false) {
+                      device_info.device.type == MEDIA_DESKTOP_VIDEO_CAPTURE) {
   DVLOG(3) << "VideoCapturerDelegate::ctor";
 
   // NULL in unit test.
   if (RenderThreadImpl::current()) {
     VideoCaptureImplManager* manager =
         RenderThreadImpl::current()->video_capture_impl_manager();
     if (manager)
       release_device_cb_ = manager->UseDevice(session_id_);
   }
 }
@@ skipping 43 matching lines @@
               &VideoCapturerDelegate::OnDeviceFormatsInUseReceived, this)));
 }
 
 void VideoCapturerDelegate::StartCapture(
     const media::VideoCaptureParams& params,
     const VideoCaptureDeliverFrameCB& new_frame_callback,
     const RunningCallback& running_callback) {
   DCHECK(params.requested_format.IsValid());
   DCHECK(thread_checker_.CalledOnValidThread());
   running_callback_ = running_callback;
-  got_first_frame_ = false;
 
   // NULL in unit test.
   if (!RenderThreadImpl::current())
     return;
   VideoCaptureImplManager* manager =
       RenderThreadImpl::current()->video_capture_impl_manager();
   if (!manager)
     return;
   stop_capture_cb_ =
       manager->StartCapture(
@@ skipping 121 matching lines @@
       frame_callback,
       base::Bind(&MediaStreamVideoCapturerSource::OnStartDone,
                  base::Unretained(this)));
 }
 
 void MediaStreamVideoCapturerSource::StopSourceImpl() {
   delegate_->StopCapture();
 }
 
 }  // namespace content