Add video frame refresh to MediaStream and VideoCapture stacks.

content/browser/renderer_host/media/video_capture_host.h

Index: content/browser/renderer_host/media/video_capture_host.h
diff --git a/content/browser/renderer_host/media/video_capture_host.h b/content/browser/renderer_host/media/video_capture_host.h
index c35153f106b0b4ec00e82dcc4be6db3110c84e8f..800f562e16f6fd66fadfa8c3fc4aeab26032411b 100644
--- a/content/browser/renderer_host/media/video_capture_host.h
+++ b/content/browser/renderer_host/media/video_capture_host.h
@@ -127,6 +127,10 @@ class CONTENT_EXPORT VideoCaptureHost
                        media::VideoCaptureSessionId session_id,
                        const media::VideoCaptureParams& params);
 
+  // IPC message: Requests that the video capture send a frame "soon" (e.g., to
+  // resolve picture loss or quality issues).
+  void OnRequestRefreshFrame(int device_id);
+
   // IPC message: Called when a renderer is finished using a buffer. Notifies
   // the controller.
   void OnRendererFinishedWithBuffer(int device_id,