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

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 16 matching lines @@
 WebScrollOffsetAnimationCurveImpl::type() const {
   return WebCompositorAnimationCurve::AnimationCurveTypeScrollOffset;
 }
 
 void WebScrollOffsetAnimationCurveImpl::setInitialValue(
     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);
+  gfx::ScrollOffset value =
+      curve_->GetValue(base::TimeDelta::FromSecondsD(time));
   return WebFloatPoint(value.x(), value.y());
 }
 
 double WebScrollOffsetAnimationCurveImpl::duration() const {
   return curve_->Duration().InSecondsF();
 }
 
 scoped_ptr<cc::AnimationCurve>
 WebScrollOffsetAnimationCurveImpl::CloneToAnimationCurve() const {
   return curve_->Clone();
 }
 
 }  // namespace cc_blink