media: Cleanup class/struct forward declarations

media/blink/webmediaplayer_cast_android.h

 // Copyright 2016 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.
 
 // Delete this file when WMPI_CAST is no longer needed.
 
 #ifndef MEDIA_BLINK_WEBMEDIAPLAYER_CAST_ANDROID_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_CAST_ANDROID_H_
 
 #include "base/memory/weak_ptr.h"
 #include "media/blink/media_blink_export.h"
 #include "media/blink/renderer_media_player_interface.h"
 #include "media/blink/webmediaplayer_params.h"
 #include "url/gurl.h"
 
 namespace blink {
 class WebLocalFrame;
 class WebMediaPlayerClient;
 class WebURL;
 }
 
 namespace media {
 
 class VideoFrame;
-class WebMediaPlayerDelegate;
 class WebMediaPlayerImpl;
 
 // This shim allows WebMediaPlayer to act sufficiently similar to
 // WebMediaPlayerAndroid (by extending RendererMediaPlayerInterface)
 // to implement cast functionality.
 class WebMediaPlayerCast : public RendererMediaPlayerInterface {
  public:
   WebMediaPlayerCast(WebMediaPlayerImpl* impl,
                      blink::WebMediaPlayerClient* client,
                      const WebMediaPlayerParams::Context3DCB& context_3d_cb);
@@ skipping 102 matching lines @@
 // Make a texture-backed video of the given size containing the given message.
 MEDIA_BLINK_EXPORT scoped_refptr<VideoFrame> MakeTextFrameForCast(
     const std::string& remote_playback_message,
     gfx::Size canvas_size,
     gfx::Size natural_size,
     const base::Callback<gpu::gles2::GLES2Interface*()>& context_3d_cb);
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_CAST_ANDROID_H_