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

cc/blink/web_scroll_offset_animation_curve_impl.cc

 // 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.
 
 #include "cc/blink/web_scroll_offset_animation_curve_impl.h"
 
 #include "cc/animation/scroll_offset_animation_curve.h"
 #include "cc/animation/timing_function.h"
 #include "cc/blink/web_animation_curve_common.h"
 
@@ skipping 21 matching lines @@
     WebFloatPoint initial_value) {
   curve_->SetInitialValue(gfx::ScrollOffset(initial_value.x, initial_value.y));
 }
 
 WebFloatPoint WebScrollOffsetAnimationCurveImpl::getValue(double time) const {
   gfx::ScrollOffset value = curve_->GetValue(time);
   return WebFloatPoint(value.x(), value.y());
 }
 
 double WebScrollOffsetAnimationCurveImpl::duration() const {
-  return curve_->Duration();
+  return curve_->Duration().InSecondsF();
 }
 
 scoped_ptr<cc::AnimationCurve>
 WebScrollOffsetAnimationCurveImpl::CloneToAnimationCurve() const {
   return curve_->Clone();
 }
 
 }  // namespace cc_blink