content: Cleanup class/struct forward declarations

content/renderer/media/android/media_player_renderer_client_factory.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.
 
 #ifndef CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_PLAYER_RENDERER_CLIENT_FACTORY_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_PLAYER_RENDERER_CLIENT_FACTORY_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "media/base/android/stream_texture_wrapper.h"
 #include "media/base/renderer_factory.h"
 #include "media/mojo/clients/mojo_renderer_factory.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 
-namespace media {
-class GpuVideoAcceleratorFactories;
-}
-
 namespace content {
 
 // The default class for creating a MediaPlayerRendererClient
 // and its associated MediaPlayerRenderer.
 class CONTENT_EXPORT MediaPlayerRendererClientFactory
     : public media::RendererFactory {
  public:
   using GetStreamTextureWrapperCB =
       base::Callback<media::ScopedStreamTextureWrapper()>;
 
@@ skipping 14 matching lines @@
   GetStreamTextureWrapperCB get_stream_texture_wrapper_cb_;
 
   scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
 
   std::unique_ptr<media::RendererFactory> mojo_renderer_factory_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_MEDIA_PLAYER_RENDERER_CLIENT_FACTORY_H_