Remove parts of //cc we aren't using

cc/animation/timing_function.cc

-// 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.
-
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "cc/animation/timing_function.h"
-#include "cc/base/math_util.h"
-
-namespace cc {
-
-TimingFunction::TimingFunction() {}
-
-TimingFunction::~TimingFunction() {}
-
-scoped_ptr<CubicBezierTimingFunction> CubicBezierTimingFunction::Create(
-    double x1, double y1, double x2, double y2) {
-  return make_scoped_ptr(new CubicBezierTimingFunction(x1, y1, x2, y2));
-}
-
-CubicBezierTimingFunction::CubicBezierTimingFunction(double x1,
-                                                     double y1,
-                                                     double x2,
-                                                     double y2)
-    : bezier_(x1, y1, x2, y2) {}
-
-CubicBezierTimingFunction::~CubicBezierTimingFunction() {}
-
-float CubicBezierTimingFunction::GetValue(double x) const {
-  return static_cast<float>(bezier_.Solve(x));
-}
-
-float CubicBezierTimingFunction::Velocity(double x) const {
-  return static_cast<float>(bezier_.Slope(x));
-}
-
-void CubicBezierTimingFunction::Range(float* min, float* max) const {
-  double min_d = 0;
-  double max_d = 1;
-  bezier_.Range(&min_d, &max_d);
-  *min = static_cast<float>(min_d);
-  *max = static_cast<float>(max_d);
-}
-
-scoped_ptr<TimingFunction> CubicBezierTimingFunction::Clone() const {
-  return make_scoped_ptr(new CubicBezierTimingFunction(*this));
-}
-
-// These numbers come from
-// http://www.w3.org/TR/css3-transitions/#transition-timing-function_tag.
-scoped_ptr<TimingFunction> EaseTimingFunction::Create() {
-  return CubicBezierTimingFunction::Create(0.25, 0.1, 0.25, 1.0);
-}
-
-scoped_ptr<TimingFunction> EaseInTimingFunction::Create() {
-  return CubicBezierTimingFunction::Create(0.42, 0.0, 1.0, 1.0);
-}
-
-scoped_ptr<TimingFunction> EaseOutTimingFunction::Create() {
-  return CubicBezierTimingFunction::Create(0.0, 0.0, 0.58, 1.0);
-}
-
-scoped_ptr<TimingFunction> EaseInOutTimingFunction::Create() {
-  return CubicBezierTimingFunction::Create(0.42, 0.0, 0.58, 1);
-}
-
-scoped_ptr<StepsTimingFunction> StepsTimingFunction::Create(
-    int steps,
-    float steps_start_offset) {
-  return make_scoped_ptr(new StepsTimingFunction(steps, steps_start_offset));
-}
-
-StepsTimingFunction::StepsTimingFunction(int steps, float steps_start_offset)
-    : steps_(steps), steps_start_offset_(steps_start_offset) {
-  // Restrict it to CSS presets: step_start, step_end and step_middle.
-  // See the Web Animations specification, 3.12.4. Timing in discrete steps.
-  DCHECK(steps_start_offset_ == 0 || steps_start_offset_ == 1 ||
-         steps_start_offset_ == 0.5);
-}
-
-StepsTimingFunction::~StepsTimingFunction() {
-}
-
-float StepsTimingFunction::GetValue(double t) const {
-  const double steps = static_cast<double>(steps_);
-  const double value = MathUtil::ClampToRange(
-      std::floor((steps * t) + steps_start_offset_) / steps, 0.0, 1.0);
-  return static_cast<float>(value);
-}
-
-scoped_ptr<TimingFunction> StepsTimingFunction::Clone() const {
-  return make_scoped_ptr(new StepsTimingFunction(*this));
-}
-
-void StepsTimingFunction::Range(float* min, float* max) const {
-  *min = 0.0f;
-  *max = 1.0f;
-}
-
-float StepsTimingFunction::Velocity(double x) const {
-  return 0.0f;
-}
-
-}  // namespace cc