getUserMedia: handle the device starting status report.

content/renderer/media/video_capture_impl.h

Index: content/renderer/media/video_capture_impl.h
diff --git a/content/renderer/media/video_capture_impl.h b/content/renderer/media/video_capture_impl.h
index 55e8b536d559be4fcecca924c434f8b2c37181f1..bb0bfe8c88315d3996d19a8f5956cf46d3ae0ebe 100644
--- a/content/renderer/media/video_capture_impl.h
+++ b/content/renderer/media/video_capture_impl.h
@@ -151,6 +151,11 @@ class CONTENT_EXPORT VideoCaptureImpl : public mojom::VideoCaptureObserver {
 
   base::ThreadChecker io_thread_checker_;
 
+  // Flag set to True when captured frames are dropped due to arriving earlier
+  // than OnStarted event. Then a frame refresh request will be sent out later
+  // when OnStarted arrives, for a new frame to start the video call with.
+  bool should_request_refresh_frame_on_started_;
+
   // WeakPtrFactory pointing back to |this| object, for use with
   // media::VideoFrames constructed in OnBufferReceived() from buffers cached
   // in |client_buffers_|.