Add different error codes for getUserMedia.

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"
 
 namespace content {
 
 class CONTENT_EXPORT MediaStreamDispatcherEventHandler {
  public:
   // A new media stream have been created.
   virtual void OnStreamGenerated(
       int request_id,
       const std::string& label,
       const StreamDeviceInfoArray& audio_device_array,
       const 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;
+  virtual void OnStreamGenerationFailed(
+      int request_id,
+      content::MediaStreamRequestResult result) = 0;
 
   // A device has been stopped in the browser processes.
   virtual void OnDeviceStopped(
       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,
       const std::string& label,
       const StreamDeviceInfo& device_info) = 0;
 
   // Failed to open the device.
   virtual void OnDeviceOpenFailed(int request_id) = 0;
 
  protected:
   virtual ~MediaStreamDispatcherEventHandler() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DISPATCHER_EVENTHANDLER_H_