Remove dead code related to media device enumerations and monitoring.

content/renderer/media/media_stream_dispatcher_eventhandler.h

Index: content/renderer/media/media_stream_dispatcher_eventhandler.h
diff --git a/content/renderer/media/media_stream_dispatcher_eventhandler.h b/content/renderer/media/media_stream_dispatcher_eventhandler.h
index 6ecda1605aae6d0f06801b77498d1797685e2c5c..7029bcb61170cc8ed638ee3f2e3d297cad0018fb 100644
--- a/content/renderer/media/media_stream_dispatcher_eventhandler.h
+++ b/content/renderer/media/media_stream_dispatcher_eventhandler.h
@@ -32,11 +32,6 @@ class CONTENT_EXPORT MediaStreamDispatcherEventHandler {
       const std::string& label,
       const StreamDeviceInfo& device_info) = 0;
 
-  // A new list of devices have been enumerated.
-  virtual void OnDevicesEnumerated(
-      int request_id,
-      const StreamDeviceInfoArray& device_array) = 0;
-
   // A device has been opened.
   virtual void OnDeviceOpened(
       int request_id,
@@ -46,8 +41,6 @@ class CONTENT_EXPORT MediaStreamDispatcherEventHandler {
   // Failed to open the device.
   virtual void OnDeviceOpenFailed(int request_id) = 0;
 
-  virtual void OnDevicesChanged() = 0;
-
  protected:
   virtual ~MediaStreamDispatcherEventHandler() {}
 };