Remove parts of //cc we aren't using

cc/input/scroll_elasticity_helper.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_INPUT_SCROLL_ELASTICITY_HELPER_H_
-#define CC_INPUT_SCROLL_ELASTICITY_HELPER_H_
-
-#include "base/time/time.h"
-#include "cc/base/cc_export.h"
-#include "ui/gfx/geometry/scroll_offset.h"
-#include "ui/gfx/geometry/vector2d_f.h"
-
-namespace cc {
-
-class LayerTreeHostImpl;
-
-// ScrollElasticityHelper is based on
-// WebKit/Source/platform/mac/ScrollElasticityController.h
-/*
- * Copyright (C) 2011 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-// Interface between a LayerTreeHostImpl and the ScrollElasticityController. It
-// would be possible, in principle, for LayerTreeHostImpl to implement this
-// interface itself. This artificial boundary is introduced to reduce the amount
-// of logic and state held directly inside LayerTreeHostImpl.
-class CC_EXPORT ScrollElasticityHelper {
- public:
-  static ScrollElasticityHelper* CreateForLayerTreeHostImpl(
-      LayerTreeHostImpl* layer_tree_host_impl);
-
-  virtual ~ScrollElasticityHelper() {}
-
-  virtual bool IsUserScrollable() const = 0;
-
-  // The amount that the view is stretched past the normal allowable bounds.
-  virtual gfx::Vector2dF StretchAmount() const = 0;
-  virtual void SetStretchAmount(const gfx::Vector2dF& stretch_amount) = 0;
-
-  // Functions for the scrolling of the root scroll layer.
-  virtual gfx::ScrollOffset ScrollOffset() const = 0;
-  virtual gfx::ScrollOffset MaxScrollOffset() const = 0;
-  virtual void ScrollBy(const gfx::Vector2dF& delta) = 0;
-
-  // Request that the controller have its Animate method called for the next
-  // frame.
-  virtual void RequestAnimate() = 0;
-};
-
-}  // namespace cc
-
-#endif  // CC_INPUT_SCROLL_ELASTICITY_HELPER_H_