Remove dead code related to media device enumerations and monitoring.

content/renderer/media/media_stream_dispatcher.h

Index: content/renderer/media/media_stream_dispatcher.h
diff --git a/content/renderer/media/media_stream_dispatcher.h b/content/renderer/media/media_stream_dispatcher.h
index a5fbbbd0640a2882cd1f4f0d1ee884a6bdf7437e..3cc993ad9fe249923329e3d351adbc0b7dc95838 100644
--- a/content/renderer/media/media_stream_dispatcher.h
+++ b/content/renderer/media/media_stream_dispatcher.h
@@ -55,18 +55,6 @@ class CONTENT_EXPORT MediaStreamDispatcher
   // 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,
@@ -83,17 +71,6 @@ class CONTENT_EXPORT MediaStreamDispatcher
   // 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.
@@ -104,9 +81,6 @@ class CONTENT_EXPORT MediaStreamDispatcher
 
  protected:
   int GetNextIpcIdForTest() { return next_ipc_id_; }
-  size_t NumDeviceChangeSubscribers() const {
-    return device_change_subscribers_.size();
-  }
 
  private:
   FRIEND_TEST_ALL_PREFIXES(MediaStreamDispatcherTest, BasicVideoDevice);
@@ -135,15 +109,11 @@ class CONTENT_EXPORT MediaStreamDispatcher
       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_;
@@ -157,9 +127,6 @@ class CONTENT_EXPORT MediaStreamDispatcher
   typedef std::list<Request> RequestList;
   RequestList requests_;
 
-  std::vector<base::WeakPtr<MediaStreamDispatcherEventHandler>>
-      device_change_subscribers_;
-
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcher);
 };