Re-added OnChannelClosing in MediaStreamDispatcherHost to close open media devices.

content/browser/renderer_host/media/video_capture_manager.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.
 
 // VideoCaptureManager is used to open/close, start/stop, enumerate available
 // video capture devices, and manage VideoCaptureController's.
 // All functions are expected to be called from Browser::IO thread.
 // VideoCaptureManager will open OS dependent instances of VideoCaptureDevice.
 // A device can only be opened once.
 
@@ skipping 105 matching lines @@
   void PostOnError(int capture_session_id, MediaStreamProviderError error);
 
   // Helpers
   void GetAvailableDevices(media::VideoCaptureDevice::Names* device_names);
   bool DeviceOpened(const media::VideoCaptureDevice::Name& device_name);
   bool DeviceInUse(const media::VideoCaptureDevice* video_capture_device);
   media::VideoCaptureDevice* GetOpenedDevice(
       const StreamDeviceInfo& device_info);
   bool IsOnCaptureDeviceThread() const;
   media::VideoCaptureDevice* GetDeviceInternal(int capture_session_id);
-  void TerminateOnDeviceThread();
 
   // Thread for all calls to VideoCaptureDevice.
   base::Thread vc_device_thread_;
 
   // Only accessed on Browser::IO thread.
   MediaStreamProviderListener* listener_;
   int new_capture_session_id_;
 
   // Only accessed from vc_device_thread_.
   // VideoCaptureManager owns all VideoCaptureDevices and is responsible for
@@ skipping 10 matching lines @@
   // VideoCaptureDevice is one-to-one mapped to VideoCaptureController.
   typedef std::map<media::VideoCaptureDevice*, Controller*> Controllers;
   Controllers controllers_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager);
 };
 
 }  // namespace media_stream
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_