chromecast: Cleanup class/struct fwd declarations

chromecast/media/service/cast_renderer.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 CHROMECAST_MEDIA_SERVICE_CAST_RENDERER_H_
 #define CHROMECAST_MEDIA_SERVICE_CAST_RENDERER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "chromecast/media/base/media_resource_tracker.h"
 #include "chromecast/media/base/video_resolution_policy.h"
 #include "chromecast/media/service/media_pipeline_backend_factory.h"
 #include "media/base/renderer.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }  // namespace base
 
-namespace media {
-class MediaLog;
-}  // namespace media
-
 namespace chromecast {
 class TaskRunnerImpl;
 
 namespace media {
 class BalancedMediaTaskRunnerFactory;
 class CastCdmContext;
 class MediaPipelineImpl;
 
 class CastRenderer : public ::media::Renderer,
                      public VideoResolutionPolicy::Observer {
@@ skipping 50 matching lines @@
   gfx::Size video_res_;
 
   base::WeakPtrFactory<CastRenderer> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(CastRenderer);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_SERVICE_CAST_RENDERER_H_