Add different error codes for getUserMedia.

content/browser/renderer_host/media/media_stream_requester.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_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_REQUESTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_REQUESTER_H_
 
 #include <string>
 
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 
 namespace content {
 
 // MediaStreamRequester must be implemented by the class requesting a new media
 // stream to be opened. MediaStreamManager will use this interface to signal
 // success and error for a request.
 class CONTENT_EXPORT MediaStreamRequester {
  public:
   // Called as a reply of a successful call to GenerateStream.
   virtual void StreamGenerated(int render_view_id,
                                int page_request_id,
                                const std::string& label,
                                const StreamDeviceInfoArray& audio_devices,
                                const StreamDeviceInfoArray& video_devices) = 0;
   // Called if GenerateStream failed.
-  virtual void StreamGenerationFailed(int render_view_id,
-                                      int page_request_id) = 0;
+  virtual void StreamGenerationFailed(
+      int render_view_id,
+      int page_request_id,
+      content::MediaStreamRequestResult result) = 0;
   // Called if a device has been stopped by a user from UI or the device
   // has become unavailable.  |render_view_id| is the render view that requested
   // the device and |label| is the label of the request|.
   virtual void DeviceStopped(int render_view_id,
                              const std::string& label,
                              const StreamDeviceInfo& device) = 0;
   // Called as a reply of a successful call to EnumerateDevices.
   virtual void DevicesEnumerated(int render_view_id,
                                  int page_request_id,
                                  const std::string& label,
                                  const StreamDeviceInfoArray& devices) = 0;
   // Called as a reply of a successful call to OpenDevice.
   virtual void DeviceOpened(int render_view_id,
                             int page_request_id,
                             const std::string& label,
                             const StreamDeviceInfo& device_info) = 0;
 
  protected:
   virtual ~MediaStreamRequester() {
   }
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_REQUESTER_H_