Remove parts of //cc we aren't using

cc/input/page_scale_animation.h

-// Copyright 2011 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_PAGE_SCALE_ANIMATION_H_
-#define CC_INPUT_PAGE_SCALE_ANIMATION_H_
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/time/time.h"
-#include "cc/base/cc_export.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gfx/geometry/vector2d.h"
-#include "ui/gfx/geometry/vector2d_f.h"
-
-namespace cc {
-
-class TimingFunction;
-
-// Used in the CC to pass around a scale animation that hasn't yet been
-// initialized.
-struct PendingPageScaleAnimation {
-  PendingPageScaleAnimation(
-      const gfx::Vector2d _target_offset,
-      bool _use_anchor,
-      float _scale,
-      const base::TimeDelta& _duration)
-      : target_offset(_target_offset),
-        use_anchor(_use_anchor),
-        scale(_scale),
-        duration(_duration) {}
-  gfx::Vector2d target_offset;
-  bool use_anchor;
-  float scale;
-  base::TimeDelta duration;
-};
-
-// A small helper class that does the math for zoom animations, primarily for
-// double-tap zoom. Initialize it with starting and ending scroll/page scale
-// positions and an animation length time, then call ...AtTime() at every frame
-// to obtain the current interpolated position. The supplied timing function
-// is used to ease the animation.
-//
-// All sizes and vectors in this class's public methods are in the root scroll
-// layer's coordinate space.
-class CC_EXPORT PageScaleAnimation {
- public:
-  // Construct with the state at the beginning of the animation.
-  static scoped_ptr<PageScaleAnimation> Create(
-      const gfx::Vector2dF& start_scroll_offset,
-      float start_page_scale_factor,
-      const gfx::SizeF& viewport_size,
-      const gfx::SizeF& root_layer_size,
-      scoped_ptr<TimingFunction> timing_function);
-
-  ~PageScaleAnimation();
-
-  // The following methods initialize the animation. Call one of them
-  // immediately after construction to set the final scroll and page scale.
-
-  // Zoom while explicitly specifying the top-left scroll position.
-  void ZoomTo(const gfx::Vector2dF& target_scroll_offset,
-              float target_page_scale_factor,
-              double duration);
-
-  // Zoom based on a specified anchor. The animator will attempt to keep it
-  // at the same position on the physical display throughout the animation,
-  // unless the edges of the root layer are hit. The anchor is specified
-  // as an offset from the content layer.
-  void ZoomWithAnchor(const gfx::Vector2dF& anchor,
-                      float target_page_scale_factor,
-                      double duration);
-
-  // These should be called before the first frame of animation to initialize
-  // the start time. StartAnimation should only be called once after creation.
-  bool IsAnimationStarted() const;
-  void StartAnimation(base::TimeTicks time);
-
-  // Call these functions while the animation is in progress to output the
-  // current state.
-  gfx::Vector2dF ScrollOffsetAtTime(base::TimeTicks time) const;
-  float PageScaleFactorAtTime(base::TimeTicks time) const;
-  bool IsAnimationCompleteAtTime(base::TimeTicks time) const;
-
-  // The following methods return state which is invariant throughout the
-  // course of the animation.
-  base::TimeTicks start_time() const { return start_time_; }
-  base::TimeDelta duration() const { return duration_; }
-  base::TimeTicks end_time() const { return start_time_ + duration_; }
-  gfx::Vector2dF target_scroll_offset() const { return target_scroll_offset_; }
-  float target_page_scale_factor() const { return target_page_scale_factor_; }
-
- protected:
-  PageScaleAnimation(const gfx::Vector2dF& start_scroll_offset,
-                     float start_page_scale_factor,
-                     const gfx::SizeF& viewport_size,
-                     const gfx::SizeF& root_layer_size,
-                     scoped_ptr<TimingFunction> timing_function);
-
- private:
-  void ClampTargetScrollOffset();
-  void InferTargetScrollOffsetFromStartAnchor();
-  void InferTargetAnchorFromScrollOffsets();
-
-  gfx::SizeF StartViewportSize() const;
-  gfx::SizeF TargetViewportSize() const;
-  float InterpAtTime(base::TimeTicks time) const;
-  gfx::SizeF ViewportSizeAt(float interp) const;
-  gfx::Vector2dF ScrollOffsetAt(float interp) const;
-  gfx::Vector2dF AnchorAt(float interp) const;
-  gfx::Vector2dF ViewportRelativeAnchorAt(float interp) const;
-  float PageScaleFactorAt(float interp) const;
-
-  float start_page_scale_factor_;
-  float target_page_scale_factor_;
-  gfx::Vector2dF start_scroll_offset_;
-  gfx::Vector2dF target_scroll_offset_;
-
-  gfx::Vector2dF start_anchor_;
-  gfx::Vector2dF target_anchor_;
-
-  gfx::SizeF viewport_size_;
-  gfx::SizeF root_layer_size_;
-
-  base::TimeTicks start_time_;
-  base::TimeDelta duration_;
-
-  scoped_ptr<TimingFunction> timing_function_;
-
-  DISALLOW_COPY_AND_ASSIGN(PageScaleAnimation);
-};
-
-}  // namespace cc
-
-#endif  // CC_INPUT_PAGE_SCALE_ANIMATION_H_