Add video frame refresh to MediaStream and VideoCapture stacks.

content/browser/renderer_host/media/video_capture_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.
 
 // VideoCaptureManager is used to open/close, start/stop, enumerate available
 // video capture devices, and manage VideoCaptureController's.
 // All functions are expected to be called from Browser::IO thread. Some helper
 // functions (*OnDeviceThread) will dispatch operations to the device thread.
 // VideoCaptureManager will open OS dependent instances of VideoCaptureDevice.
 // A device can only be opened once.
@@ skipping 94 matching lines @@
   // and it will take a little time to resume.
   // Allocating device could failed if other app holds the camera, the error
   // will be notified through VideoCaptureControllerEventHandler::OnError().
   void ResumeCaptureForClient(
       media::VideoCaptureSessionId session_id,
       const media::VideoCaptureParams& params,
       VideoCaptureController* controller,
       VideoCaptureControllerID client_id,
       VideoCaptureControllerEventHandler* client_handler);
 
+  // Called by VideoCaptureHost to request a refresh frame from the video
+  // capture device.
+  void RequestRefreshFrameForClient(VideoCaptureController* controller);
+
   // Retrieves all capture supported formats for a particular device. Returns
   // false if the |capture_session_id| is not found. The supported formats are
   // cached during device(s) enumeration, and depending on the underlying
   // implementation, could be an empty list.
   bool GetDeviceSupportedFormats(
       media::VideoCaptureSessionId capture_session_id,
       media::VideoCaptureFormats* supported_formats);
 
   // Retrieves the format(s) currently in use.  Returns false if the
   // |capture_session_id| is not found. Returns true and |formats_in_use|
@@ skipping 229 matching lines @@
   // Map used by DesktopCapture.
   std::map<media::VideoCaptureSessionId, gfx::NativeViewId>
       notification_window_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_