content: Cleanup class/struct forward declarations

content/renderer/media/user_media_client_impl.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_USER_MEDIA_CLIENT_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_USER_MEDIA_CLIENT_IMPL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 18 matching lines @@
 #include "third_party/WebKit/public/web/WebMediaDeviceChangeObserver.h"
 #include "third_party/WebKit/public/web/WebMediaDevicesRequest.h"
 #include "third_party/WebKit/public/web/WebUserMediaClient.h"
 #include "third_party/WebKit/public/web/WebUserMediaRequest.h"
 
 namespace content {
 class PeerConnectionDependencyFactory;
 class MediaStreamAudioSource;
 class MediaStreamDispatcher;
 class MediaStreamVideoSource;
-class VideoCapturerDelegate;
 
 // UserMediaClientImpl is a delegate for the Media Stream GetUserMedia API.
 // It ties together WebKit and MediaStreamManager
 // (via MediaStreamDispatcher and MediaStreamDispatcherHost)
 // in the browser process. It must be created, called and destroyed on the
 // render thread.
 class CONTENT_EXPORT UserMediaClientImpl
     : public RenderFrameObserver,
       NON_EXPORTED_BASE(public blink::WebUserMediaClient),
       public MediaStreamDispatcherEventHandler,
@@ skipping 224 matching lines @@
   // Note: This member must be the last to ensure all outstanding weak pointers
   // are invalidated first.
   base::WeakPtrFactory<UserMediaClientImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UserMediaClientImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_USER_MEDIA_CLIENT_IMPL_H_