Make Keyframe use TimeTicks/TimeDelta to represent time instead of double.

ui/compositor/float_animation_curve_adapter.cc

 // Copyright (c) 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 "ui/compositor/float_animation_curve_adapter.h"
 
+#include "cc/base/time_util.h"
+
 namespace ui {
 
 FloatAnimationCurveAdapter::FloatAnimationCurveAdapter(
     gfx::Tween::Type tween_type,
     float initial_value,
     float target_value,
     base::TimeDelta duration)
     : tween_type_(tween_type),
       initial_value_(initial_value),
       target_value_(target_value),
       duration_(duration) {
 }
 
 base::TimeDelta FloatAnimationCurveAdapter::Duration() const {
   return duration_;
 }
 
 scoped_ptr<cc::AnimationCurve> FloatAnimationCurveAdapter::Clone() const {
   return make_scoped_ptr(new FloatAnimationCurveAdapter(
       tween_type_, initial_value_, target_value_, duration_));
 }
 
-float FloatAnimationCurveAdapter::GetValue(double t) const {
-  if (t >= duration_.InSecondsF())
+float FloatAnimationCurveAdapter::GetValue(base::TimeDelta t) const {
+  if (t >= duration_)
     return target_value_;
-  if (t <= 0.0)
+  if (t <= base::TimeDelta())
     return initial_value_;
-  double progress = t / duration_.InSecondsF();
+  double progress = cc::TimeUtil::Divide(t, duration_);
   return gfx::Tween::FloatValueBetween(
       gfx::Tween::CalculateValue(tween_type_, progress),
       initial_value_,
       target_value_);
 }
 
 }  // namespace ui