getUserMedia: handle the device starting status report.

content/browser/renderer_host/media/video_capture_controller.h

 // Copyright (c) 2012 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_CAPTURE_CONTROLLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_H_
 
 #include <list>
 #include <memory>
 
@@ skipping 162 matching lines @@
       const std::vector<BufferContext>::iterator& buffer_state_iter);
 
   std::unique_ptr<media::VideoFrameConsumerFeedbackObserver>
       consumer_feedback_observer_;
 
   std::vector<BufferContext> buffer_contexts_;
 
   // All clients served by this controller.
   ControllerClients controller_clients_;
 
-  // Takes on only the states 'STARTED' and 'ERROR'. 'ERROR' is an absorbing
-  // state which stops the flow of data to clients.
+  // Takes on only the states 'STARTING', 'STARTED' and 'ERROR'. 'ERROR' is an
+  // absorbing state which stops the flow of data to clients.
   VideoCaptureState state_;
 
   int next_buffer_context_id_ = 0;
 
   // True if the controller has received a video frame from the device.
   bool has_received_frames_;
 
   media::VideoCaptureFormat video_capture_format_;
 
   base::WeakPtrFactory<VideoCaptureController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_H_