Remove parts of //cc we aren't using

cc/layers/io_surface_layer.h

-// Copyright 2012 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_IO_SURFACE_LAYER_H_
-#define CC_LAYERS_IO_SURFACE_LAYER_H_
-
-#include "cc/base/cc_export.h"
-#include "cc/layers/layer.h"
-
-namespace cc {
-
-class CC_EXPORT IOSurfaceLayer : public Layer {
- public:
-  static scoped_refptr<IOSurfaceLayer> Create();
-
-  void SetIOSurfaceProperties(uint32_t io_surface_id, const gfx::Size& size);
-
-  scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
-  void PushPropertiesTo(LayerImpl* layer) override;
-  bool Update(ResourceUpdateQueue* queue,
-              const OcclusionTracker<Layer>* occlusion) override;
-
- protected:
-  bool HasDrawableContent() const override;
-  IOSurfaceLayer();
-
- private:
-  ~IOSurfaceLayer() override;
-
-  uint32_t io_surface_id_;
-  gfx::Size io_surface_size_;
-
-  DISALLOW_COPY_AND_ASSIGN(IOSurfaceLayer);
-};
-
-}  // namespace cc
-#endif  // CC_LAYERS_IO_SURFACE_LAYER_H_