Add video frame refresh to MediaStream and VideoCapture stacks.

content/public/renderer/media_stream_utils.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 CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_UTILS_H_
 #define CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_UTILS_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
@@ skipping 36 matching lines @@
     bool is_remote,
     bool is_readonly,
     blink::WebMediaStream* web_media_stream);
 
 // On success returns pointer to the current format of the given video track;
 // returns nullptr on failure (if the argument is invalid or if the format
 // cannot be retrieved at the moment).
 CONTENT_EXPORT const media::VideoCaptureFormat* GetCurrentVideoTrackFormat(
     const blink::WebMediaStreamTrack& video_track);
 
+// Requests that a refresh frame be sent "soon" (e.g., to resolve picture loss
+// or quality issues).
+CONTENT_EXPORT void RequestRefreshFrameFromVideoTrack(
+    const blink::WebMediaStreamTrack& video_track);
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_UTILS_H_