getUserMeida: report device starting states

services/video_capture/receiver_mojo_to_media_adapter.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 SERVICES_VIDEO_CAPTURE_RECEIVER_MOJO_TO_MEDIA_ADAPTER_H_
 #define SERVICES_VIDEO_CAPTURE_RECEIVER_MOJO_TO_MEDIA_ADAPTER_H_
 
 #include "media/capture/video/video_frame_receiver.h"
 #include "services/video_capture/public/interfaces/receiver.mojom.h"
 
@@ skipping 14 matching lines @@
   void OnFrameReadyInBuffer(
       int buffer_id,
       int frame_feedback_id,
       std::unique_ptr<
           media::VideoCaptureDevice::Client::Buffer::ScopedAccessPermission>
           buffer_usage_reservation,
       media::mojom::VideoFrameInfoPtr frame_info) override;
   void OnBufferRetired(int buffer_id) override;
   void OnError() override;
   void OnLog(const std::string& message) override;
+  void OnStarted() override;
 
  private:
   mojom::ReceiverPtr receiver_;
 };
 
 }  // namespace video_capture
 
 #endif  // SERVICES_VIDEO_CAPTURE_RECEIVER_MOJO_TO_MEDIA_ADAPTER_H_