Media Related changes for TabCapture API

content/browser/renderer_host/media/media_stream_manager.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.
 
 // MediaStreamManager is used to open/enumerate media capture devices (video
 // supported now). Call flow:
 // 1. GenerateStream is called when a render process wants to use a capture
 //    device.
 // 2. MediaStreamManager will ask MediaStreamDeviceSettings for permission to
 //    use devices and for which device to use.
@@ skipping 160 matching lines @@
   // of real ones. This should NOT be used in production versions of Chrome.
   static void AlwaysUseFakeDevice();
 
   // This object gets deleted on the UI thread after the IO thread has been
   // destroyed. So we need to know when IO thread is being destroyed so that
   // we can delete VideoCaptureManager and AudioInputDeviceManager.
   virtual void WillDestroyCurrentMessageLoop() OVERRIDE;
 
  private:
   // Contains all data needed to keep track of requests.
-  struct DeviceRequest;
+  class DeviceRequest;
 
   // Cache enumerated device list.
   struct EnumerationCache {
     EnumerationCache();
     ~EnumerationCache();
 
     bool valid;
     StreamDeviceInfoArray devices;
   };
 
@@ skipping 60 matching lines @@
 
   // Static members.
   static bool always_use_fake_devices_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamManager);
 };
 
 }  // namespace media_stream
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_MANAGER_H_