Remove dead code related to media device enumerations and monitoring.

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 <memory>
@@ skipping 37 matching lines @@
       const url::Origin& security_origin);
 
   // 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.
-  virtual void EnumerateDevices(
-      int request_id,
-      const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
-      MediaStreamType type,
-      const url::Origin& security_origin);
-
-  // Request to stop enumerating devices.
-  void StopEnumerateDevices(
-      int request_id,
-      const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler);
-
   // Request to open a device.
   void OpenDevice(
       int request_id,
       const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
       const std::string& device_id,
       MediaStreamType type,
       const url::Origin& security_origin);
 
   // Cancel the request to open a device.
   virtual void CancelOpenDevice(
       int request_id,
       const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler);
 
   // Close a started device. |label| is provided in OnDeviceOpened.
   void CloseDevice(const std::string& label);
 
-  // Register and unregister event handlers for device-change notifications.
-  // It is an error to try to subscribe a handler that is already subscribed or
-  // to cancel the subscription of a handler that is not subscribed. Also,
-  // each subscribed handler must make sure to invoke
-  // CancelDeviceChangeNotifications() before the handler is destroyed.
-  void SubscribeToDeviceChangeNotifications(
-      const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
-      const url::Origin& security_origin);
-  void CancelDeviceChangeNotifications(
-      const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler);
-
   // Check if the label is a valid stream.
   virtual bool IsStream(const std::string& label);
   // Get the video session_id given a label. The label identifies a stream.
   // index is the index in the video_device_array of the stream.
   virtual int video_session_id(const std::string& label, int index);
   // Returns an audio session_id given a label and an index.
   virtual int audio_session_id(const std::string& label, int index);
 
  protected:
   int GetNextIpcIdForTest() { return next_ipc_id_; }
-  size_t NumDeviceChangeSubscribers() const {
-    return device_change_subscribers_.size();
-  }
 
  private:
   FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherTest, BasicVideoDevice);
   FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherTest, TestFailure);
   FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherTest, CancelGenerateStream);
 
   struct Request;
 
   // Private class for keeping track of opened devices and who have
   // opened it.
   struct Stream;
 
   // RenderFrameObserver override.
   void OnDestruct() override;
   bool Send(IPC::Message* message) override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // Messages from the browser.
   void OnStreamGenerated(
       int request_id,
       const std::string& label,
       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 OnDeviceOpened(
       int request_id,
       const std::string& label,
       const StreamDeviceInfo& device_info);
   void OnDeviceOpenFailed(int request_id);
-  void OnDevicesChanged();
 
   // Used for DCHECKs so methods calls won't execute in the wrong thread.
   base::ThreadChecker thread_checker_;
 
   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_;
 
-  std::vector<base::WeakPtr<MediaStreamDispatcherEventHandler>>
-      device_change_subscribers_;
-
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DISPATCHER_H_