Make cc::animation::TrimTimeToCurrentIteration,cc::AnimationCurve::Duration use TimeTicks/TimeDelta

cc/animation/scroll_offset_animation_curve.cc

 // Copyright 2013 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 "cc/animation/scroll_offset_animation_curve.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/logging.h"
@@ skipping 65 matching lines @@
     return target_value_;
 
   double progress = (timing_function_->GetValue(t / duration));
   return gfx::ScrollOffset(
       gfx::Tween::FloatValueBetween(
           progress, initial_value_.x(), target_value_.x()),
       gfx::Tween::FloatValueBetween(
           progress, initial_value_.y(), target_value_.y()));
 }
 
-double ScrollOffsetAnimationCurve::Duration() const {
-  return total_animation_duration_.InSecondsF();
+base::TimeDelta ScrollOffsetAnimationCurve::Duration() const {
+  return total_animation_duration_;
 }
 
 AnimationCurve::CurveType ScrollOffsetAnimationCurve::Type() const {
   return ScrollOffset;
 }
 
 scoped_ptr<AnimationCurve> ScrollOffsetAnimationCurve::Clone() const {
   scoped_ptr<TimingFunction> timing_function(
       static_cast<TimingFunction*>(timing_function_->Clone().release()));
   scoped_ptr<ScrollOffsetAnimationCurve> curve_clone =
@@ skipping 26 matching lines @@
       (MaximumDimension(old_delta) / MaximumDimension(new_delta));
 
   initial_value_ = current_position;
   target_value_ = new_target;
   total_animation_duration_ = base::TimeDelta::FromSecondsD(t + new_duration);
   last_retarget_ = base::TimeDelta::FromSecondsD(t);
   timing_function_ = EaseOutWithInitialVelocity(new_velocity);
 }
 
 }  // namespace cc