Add MediaStreamSource frame rate calculation to the tracker.

content/renderer/media/webrtc/media_stream_remote_video_source.h

 // Copyright 2014 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_WEBRTC_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
 
 #include "base/threading/thread_checker.h"
 #include "content/common/content_export.h"
 #include "content/renderer/media/media_stream_video_source.h"
@@ skipping 21 matching lines @@
       int max_requested_height,
       double max_requested_frame_rate,
       const VideoCaptureDeviceFormatsCB& callback) OVERRIDE;
 
   virtual void StartSourceImpl(
       const media::VideoCaptureFormat& format,
       const VideoCaptureDeliverFrameCB& frame_callback) OVERRIDE;
 
   virtual void StopSourceImpl() OVERRIDE;
 
+  virtual std::string TypeName() const  OVERRIDE;
+
   // Used by tests to test that a frame can be received and that the
   // MediaStreamRemoteVideoSource behaves as expected.
   webrtc::VideoRendererInterface* RenderInterfaceForTest();
 
  private:
   // webrtc::ObserverInterface implementation.
   virtual void OnChanged() OVERRIDE;
 
   scoped_refptr<webrtc::VideoTrackInterface> remote_track_;
   webrtc::MediaStreamTrackInterface::TrackState last_state_;
 
   // Internal class used for receiving frames from the webrtc track on a
   // libjingle thread and forward it to the IO-thread.
   class RemoteVideoSourceDelegate;
   scoped_refptr<RemoteVideoSourceDelegate> delegate_;
 
   // Bound to the render thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamRemoteVideoSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_