media: Cleanup class/struct forward declarations

media/blink/webmediaplayer_params.h

 // Copyright 2013 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 MEDIA_BLINK_WEBMEDIAPLAYER_PARAMS_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_PARAMS_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/media_observer.h"
 #include "media/blink/media_blink_export.h"
 #include "media/filters/context_3d.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 class TaskRunner;
 }
 
 namespace blink {
 class WebContentDecryptionModule;
-class WebMediaPlayerClient;
 }
 
 namespace media {
 
 class SwitchableAudioRendererSink;
 class MediaLog;
 class SurfaceManager;
 
 // Holds parameters for constructing WebMediaPlayerImpl without having
 // to plumb arguments through various abstraction layers.
@@ skipping 79 matching lines @@
   blink::WebContentDecryptionModule* initial_cdm_;
   SurfaceManager* surface_manager_;
   base::WeakPtr<MediaObserver> media_observer_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebMediaPlayerParams);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_PARAMS_H_