remove VideoDeviceError and AudioDeviceError for media stream.

content/renderer/media/media_stream_dispatcher_eventhandler.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_EVENTHANDLER_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DISPATCHER_EVENTHANDLER_H_
 
 #include <string>
 
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 
 class CONTENT_EXPORT MediaStreamDispatcherEventHandler {
  public:
   // A new media stream have been created.
   virtual void OnStreamGenerated(
       int request_id,
       const std::string& label,
       const media_stream::StreamDeviceInfoArray& audio_device_array,
       const media_stream::StreamDeviceInfoArray& video_device_array) = 0;
 
   // Creation of a new media stream failed. The user might have denied access
   // to the requested devices or no device is available.
   virtual void OnStreamGenerationFailed(int request_id) = 0;
 
-  // An error have occurred on a video device. This is called if a runtime
-  // error occurs.
-  virtual void OnVideoDeviceFailed(const std::string& label,
-                                   int index) = 0;
-
-  // An error have occurred on an audio device. This is called if a runtime
-  // error occurs.
-  virtual void OnAudioDeviceFailed(const std::string& label,
-                                   int index) = 0;
-
   // A new list of devices have been enumerated.
   virtual void OnDevicesEnumerated(
       int request_id,
       const media_stream::StreamDeviceInfoArray& device_array) = 0;
 
   // Failed to enumerate devices.
   virtual void OnDevicesEnumerationFailed(int request_id) = 0;
 
   // A device has been opened.
   virtual void OnDeviceOpened(
       int request_id,
       const std::string& label,
       const media_stream::StreamDeviceInfo& device_info) = 0;
 
   // Failed to open the device.
   virtual void OnDeviceOpenFailed(int request_id) = 0;
 
  protected:
   virtual ~MediaStreamDispatcherEventHandler() {}
 };
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DISPATCHER_EVENTHANDLER_H_