Add MediaStreamSource frame rate calculation to the tracker.

content/renderer/media/media_stream_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_MEDIA_STREAM_VIDEO_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 72 matching lines @@
   static const int kDefaultFrameRate;
   static const int kUnknownFrameRate;
 
  protected:
   virtual void DoStopSource() OVERRIDE;
 
   // Sets ready state and notifies the ready state to all registered tracks.
   virtual void SetReadyState(blink::WebMediaStreamSource::ReadyState state);
 
   // Sets muted state and notifies it to all registered tracks.
-  virtual void SetMutedState(bool state);
+  virtual void OnFrameRateCallback(float framerate, int dropped_frames);
 
   // An implementation must fetch the formats that can currently be used by
   // the source and call OnSupportedFormats when done.
   // |max_requested_height| and |max_requested_width| is the max height and
   // width set as a mandatory constraint if set when calling
   // MediaStreamVideoSource::AddTrack. If max height and max width is not set
   // |max_requested_height| and |max_requested_width| are 0.
   virtual void GetCurrentSupportedFormats(
       int max_requested_width,
       int max_requested_height,
       double max_requested_frame_rate,
       const VideoCaptureDeviceFormatsCB& callback) = 0;
 
   // An implementation must start capture frames using the resolution in
   // |params|. When the source has started or the source failed to start
   // OnStartDone must be called. An implementation must call
   // |frame_callback| on the IO thread with the captured frames.
   virtual void StartSourceImpl(
       const media::VideoCaptureFormat& format,
       const VideoCaptureDeliverFrameCB& frame_callback) = 0;
   void OnStartDone(MediaStreamRequestResult result);
 
   // An implementation must immediately stop capture video frames and must not
   // call OnSupportedFormats after this method has been called. After this
   // method has been called, MediaStreamVideoSource may be deleted.
   virtual void StopSourceImpl() = 0;
 
+  virtual std::string TypeName() const;
+
   enum State {
     NEW,
     RETRIEVING_CAPABILITIES,
     STARTING,
     STARTED,
     ENDED
   };
   State state() const { return state_; }
 
  private:
@@ skipping 43 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaStreamVideoSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_