media: Cleanup class/struct forward declarations

media/remoting/remote_renderer_impl.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 MEDIA_REMOTING_REMOTE_RENDERER_IMPL_H_
 #define MEDIA_REMOTING_REMOTE_RENDERER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
 #include "media/base/buffering_state.h"
 #include "media/base/pipeline_status.h"
 #include "media/base/renderer.h"
 #include "media/base/renderer_client.h"
 #include "media/mojo/interfaces/remoting.mojom.h"
 #include "media/remoting/remoting_interstitial_ui.h"
 #include "media/remoting/rpc/rpc_broker.h"
 #include "mojo/public/cpp/system/data_pipe.h"
 
 namespace media {
 
-class BalancedMediaTaskRunnerFactory;
 class RemotingRendererController;
 class Renderer;
 
 namespace remoting {
 class RemoteDemuxerStreamAdapter;
 };
 
 // A media::Renderer implementation that use a media::Renderer to render
 // media streams.
 class RemoteRendererImpl : public Renderer {
@@ skipping 124 matching lines @@
   RemotingInterstitialUI interstitial_ui_;
 
   base::WeakPtrFactory<RemoteRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_REMOTING_REMOTE_RENDERER_IMPL_H_