Add video frame refresh to MediaStream and VideoCapture stacks.

content/public/renderer/media_stream_utils.h

Index: content/public/renderer/media_stream_utils.h
diff --git a/content/public/renderer/media_stream_utils.h b/content/public/renderer/media_stream_utils.h
index 5df43edc998836a075c59deb9e2be780ac5e447f..8b94b7222b911e92509b62e572adbddfd68f0856 100644
--- a/content/public/renderer/media_stream_utils.h
+++ b/content/public/renderer/media_stream_utils.h
@@ -54,6 +54,11 @@ CONTENT_EXPORT bool AddAudioTrackToMediaStream(
 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_