Remove parts of //cc we aren't using

cc/layers/layer_utils.h

-// Copyright 2014 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_LAYER_UTILS_H_
-#define CC_LAYERS_LAYER_UTILS_H_
-
-#include "cc/base/cc_export.h"
-
-namespace gfx {
-class BoxF;
-}  // namespace gfx
-
-namespace cc {
-class LayerImpl;
-
-class CC_EXPORT LayerUtils {
- public:
-  // Computes a box in screen space that should entirely contain the layer's
-  // bounds through the entirety of the layer's current animation. Returns
-  // true and sets |out| to the inflation if there are animations that can
-  // inflate bounds in the path to the root layer and that it was able to
-  // inflate correctly. Returns false otherwise.
-  static bool GetAnimationBounds(const LayerImpl& layer, gfx::BoxF* out);
-};
-
-}  // namespace cc
-
-#endif  // CC_LAYERS_LAYER_UTILS_H_