cc: Cleanup class/struct forward declarations

cc/layers/ui_resource_layer.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 CC_LAYERS_UI_RESOURCE_LAYER_H_
 #define CC_LAYERS_UI_RESOURCE_LAYER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/layers/layer.h"
 #include "cc/resources/ui_resource_client.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace cc {
 
 class LayerTreeHost;
-class ScopedUIResource;
 
 class CC_EXPORT UIResourceLayer : public Layer {
  public:
   static scoped_refptr<UIResourceLayer> Create();
 
   void PushPropertiesTo(LayerImpl* layer) override;
 
   void SetLayerTreeHost(LayerTreeHost* host) override;
 
   void SetBitmap(const SkBitmap& skbitmap);
@@ skipping 35 matching lines @@
  private:
   std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
   void RecreateUIResourceHolder();
 
   DISALLOW_COPY_AND_ASSIGN(UIResourceLayer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_UI_RESOURCE_LAYER_H_