getUserMeida: report device starting states

services/video_capture/receiver_mojo_to_media_adapter.cc

 // 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.
 
 #include "services/video_capture/receiver_mojo_to_media_adapter.h"
 
 #include "media/mojo/common/media_type_converters.h"
 #include "media/mojo/common/mojo_shared_buffer_video_frame.h"
 
 namespace video_capture {
@@ skipping 11 matching lines @@
 }
 
 void ReceiverMojoToMediaAdapter::OnError() {
   receiver_->OnError();
 }
 
 void ReceiverMojoToMediaAdapter::OnLog(const std::string& message) {
   receiver_->OnLog(message);
 }
 
+void ReceiverMojoToMediaAdapter::OnStarted() {
+  receiver_->OnStarted();
+}
+
 void ReceiverMojoToMediaAdapter::OnBufferRetired(int buffer_id) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace video_capture