Add video frame refresh to MediaStream and VideoCapture stacks.

content/renderer/media/video_capture_impl_manager.h

 // Copyright (c) 2012 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_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_MANAGER_H_
 #define CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_MANAGER_H_
 
 #include <map>
 
 #include "base/callback.h"
@@ skipping 55 matching lines @@
   // Returns a callback that is used to stop capturing. Note that stopping
   // video capture is not synchronous. Client should handle the case where
   // callbacks are called after capturing is instructed to stop, typically
   // by binding the passed callbacks on a WeakPtr.
   base::Closure StartCapture(
       media::VideoCaptureSessionId id,
       const media::VideoCaptureParams& params,
       const VideoCaptureStateUpdateCB& state_update_cb,
       const VideoCaptureDeliverFrameCB& deliver_frame_cb);
 
+  // Requests that the video capturer send a frame "soon" (e.g., to resolve
+  // picture loss or quality issues).
+  void RequestRefreshFrame(media::VideoCaptureSessionId id);
+
   // Get supported formats supported by the device for the given session
   // ID. |callback| will be called on the IO thread.
   void GetDeviceSupportedFormats(media::VideoCaptureSessionId id,
                                  const VideoCaptureDeviceFormatsCB& callback);
 
   // Get supported formats currently in use for the given session ID.
   // |callback| will be called on the IO thread.
   void GetDeviceFormatsInUse(media::VideoCaptureSessionId id,
                              const VideoCaptureDeviceFormatsCB& callback);
 
@@ skipping 35 matching lines @@
   // Bound to the render thread.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoCaptureImplManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureImplManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_MANAGER_H_