media: Cleanup class/struct forward declarations

media/blink/webmediaplayer_impl.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_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 52 matching lines @@
 }
 
 namespace gpu {
 namespace gles2 {
 class GLES2Interface;
 }
 }
 
 namespace media {
 class ChunkDemuxer;
-class GpuVideoAcceleratorFactories;
 class MediaKeys;
 class MediaLog;
 class UrlIndex;
 class VideoFrameCompositor;
 class WatchTimeReporter;
 class WebAudioSourceProviderImpl;
 class WebMediaPlayerDelegate;
-class WebTextTrackImpl;
 
 // The canonical implementation of blink::WebMediaPlayer that's backed by
 // Pipeline. Handles normal resource loading, Media Source, and
 // Encrypted Media.
 class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
     : public NON_EXPORTED_BASE(blink::WebMediaPlayer),
       public NON_EXPORTED_BASE(WebMediaPlayerDelegate::Observer),
       public NON_EXPORTED_BASE(Pipeline::Client),
       public base::SupportsWeakPtr<WebMediaPlayerImpl> {
  public:
@@ skipping 487 matching lines @@
 
   // Whether the player is currently in autoplay muted state.
   bool autoplay_muted_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_