getUserMeida: report device starting states

media/capture/video/file_video_capture_device.cc

 // Copyright 2013 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 "media/capture/video/file_video_capture_device.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 329 matching lines @@
 
   DCHECK(!file_parser_);
   file_parser_ = GetVideoFileParser(file_path_, &capture_format_);
   if (!file_parser_) {
     client_->OnError(FROM_HERE, "Could not open Video file");
     return;
   }
 
   DVLOG(1) << "Opened video file " << capture_format_.frame_size.ToString()
            << ", fps: " << capture_format_.frame_rate;
+  client_->OnStarted();
 
   capture_thread_.task_runner()->PostTask(
       FROM_HERE, base::Bind(&FileVideoCaptureDevice::OnCaptureTask,
                             base::Unretained(this)));
 }
 
 void FileVideoCaptureDevice::OnStopAndDeAllocate() {
   DCHECK(capture_thread_.task_runner()->BelongsToCurrentThread());
   file_parser_.reset();
   client_.reset();
@@ skipping 27 matching lines @@
     if (next_frame_time_ < current_time)
       next_frame_time_ = current_time;
   }
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::Bind(&FileVideoCaptureDevice::OnCaptureTask,
                             base::Unretained(this)),
       next_frame_time_ - current_time);
 }
 
 }  // namespace media