getUserMeida: report device starting states

content/browser/renderer_host/media/video_frame_receiver_on_io_thread.h

 // Copyright 2016 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_BROWSER_RENDERER_HOST_MEDIA_VIDEO_FRAME_RECEIVER_ON_IO_THREAD_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_FRAME_RECEIVER_ON_IO_THREAD_H_
 
 #include "content/common/content_export.h"
 #include "media/capture/video/video_frame_receiver.h"
 
 namespace content {
 
 // Decorator for media::VideoFrameReceiver that forwards all incoming calls
 // to the Browser IO thread.
 // TODO(chfremer): Change this to VideoFrameReceiverOnTaskRunner and have the
 // target task runner be passed into the constructor. See crbug.com/674190.
 class CONTENT_EXPORT VideoFrameReceiverOnIOThread
     : public media::VideoFrameReceiver {
  public:
   explicit VideoFrameReceiverOnIOThread(
       const base::WeakPtr<VideoFrameReceiver>& receiver);
   ~VideoFrameReceiverOnIOThread() override;
 
   void OnIncomingCapturedVideoFrame(
       media::VideoCaptureDevice::Client::Buffer buffer,
       scoped_refptr<media::VideoFrame> frame) override;
   void OnError() override;
   void OnLog(const std::string& message) override;
+  void OnStarted() override;
   void OnBufferRetired(int buffer_id) override;
 
  private:
   base::WeakPtr<VideoFrameReceiver> receiver_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_FRAME_RECEIVER_ON_IO_THREAD_H_