Refactor the content interface for RequestMediaAccessPermission.

content/browser/renderer_host/media/media_stream_device_settings.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.
 
 // MediaStreamDeviceSettings is used to decide which of the available capture
 // device to use as well as getting user permission to use the capture device.
 // There will be one instance of MediaStreamDeviceSettings handling all
 // requests.
 
 // Expected call flow:
@@ skipping 63 matching lines @@
   // Returns true if the UI is already processing a request for this render
   // view.
   bool IsUiBusy(int render_view_id, int render_process_id);
 
   // Finds a request ready to be sent to UI for user approval.
   std::string FindReadyRequestForView(int render_view_id,
                                       int render_process_id);
 
   // Posts a request to be approved/denied by UI.
   void PostRequestToUi(const std::string& label);
+  // Sends the request to the appropriate WebContents.
+  void DoRequest(const MediaStreamDeviceSettingsRequest* request,
+                 const content::MediaResponseCallback& callback);
 
   SettingsRequester* requester_;
   SettingsRequests requests_;
 
   // See comment above for method UseFakeUI. Used for automated testing.
   bool use_fake_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDeviceSettings);
 };
 
 }  // namespace media_stream
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DEVICE_SETTINGS_H_