Revert of Removed unused cricket::VideoCapturer methods

webrtc/media/base/capturemanager.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 35 matching lines @@
   };
 
   CaptureManager();
   virtual ~CaptureManager();
 
   virtual bool StartVideoCapture(VideoCapturer* video_capturer,
                                  const VideoFormat& desired_format);
   virtual bool StopVideoCapture(VideoCapturer* video_capturer,
                                 const VideoFormat& format);
 
+  // Possibly restarts the capturer. If |options| is set to kRequestRestart,
+  // the CaptureManager chooses whether this request can be handled with the
+  // current state or if a restart is actually needed. If |options| is set to
+  // kForceRestart, the capturer is restarted.
+  virtual bool RestartVideoCapture(VideoCapturer* video_capturer,
+                                   const VideoFormat& previous_format,
+                                   const VideoFormat& desired_format,
+                                   RestartOptions options);
+
   virtual void AddVideoSink(VideoCapturer* video_capturer,
                             rtc::VideoSinkInterface<VideoFrame>* sink);
   virtual void RemoveVideoSink(VideoCapturer* video_capturer,
                                rtc::VideoSinkInterface<VideoFrame>* sink);
 
   sigslot::repeater2<VideoCapturer*, CaptureState> SignalCapturerStateChange;
 
  private:
   typedef std::map<VideoCapturer*, VideoCapturerState*> CaptureStates;
 
   bool IsCapturerRegistered(VideoCapturer* video_capturer) const;
   bool RegisterVideoCapturer(VideoCapturer* video_capturer);
   void UnregisterVideoCapturer(VideoCapturerState* capture_state);
 
   bool StartWithBestCaptureFormat(VideoCapturerState* capture_info,
                                   VideoCapturer* video_capturer);
 
   VideoCapturerState* GetCaptureState(VideoCapturer* video_capturer) const;
 
   rtc::ThreadChecker thread_checker_;
   CaptureStates capture_states_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_BASE_CAPTUREMANAGER_H_