Implement getMediaDevices.

content/renderer/media/media_stream_dispatcher.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_RENDERER_MEDIA_MEDIA_STREAM_DISPATCHER_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DISPATCHER_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 38 matching lines @@
 
   // Cancel the request for a new media stream to be created.
   virtual void CancelGenerateStream(
       int request_id,
       const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler);
 
   // Stop a started device that has been requested by calling GenerateStream.
   virtual void StopStreamDevice(const StreamDeviceInfo& device_info);
 
   // Request to enumerate devices.
-  void EnumerateDevices(
+  virtual void EnumerateDevices(
       int request_id,
       const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
       MediaStreamType type,
       const GURL& security_origin);
 
   // Request to stop enumerating devices.
   void StopEnumerateDevices(
       int request_id,
       const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler);
 
@@ skipping 46 matching lines @@
       const StreamDeviceInfoArray& audio_array,
       const StreamDeviceInfoArray& video_array);
   void OnStreamGenerationFailed(
       int request_id,
       content::MediaStreamRequestResult result);
   void OnDeviceStopped(const std::string& label,
                        const StreamDeviceInfo& device_info);
   void OnDevicesEnumerated(
       int request_id,
       const StreamDeviceInfoArray& device_array);
-  void OnDevicesEnumerationFailed(int request_id);
   void OnDeviceOpened(
       int request_id,
       const std::string& label,
       const StreamDeviceInfo& device_info);
   void OnDeviceOpenFailed(int request_id);
 
   // Used for DCHECKs so methods calls won't execute in the wrong thread.
   scoped_refptr<base::MessageLoopProxy> main_loop_;
 
   int next_ipc_id_;
   typedef std::map<std::string, Stream> LabelStreamMap;
   LabelStreamMap label_stream_map_;
 
   // List of calls made to the browser process that have not yet completed or
   // been canceled.
   typedef std::list<Request> RequestList;
   RequestList requests_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DISPATCHER_H_