CC::Animations should use TimeTicks & TimeDelta to represent time

webkit/renderer/compositor_bindings/web_animation_impl.cc

Index: webkit/renderer/compositor_bindings/web_animation_impl.cc
diff --git a/webkit/renderer/compositor_bindings/web_animation_impl.cc b/webkit/renderer/compositor_bindings/web_animation_impl.cc
index 92d2fd46adead6c1b56b1f5abeadedd56be5ad64..b150a42b03e6ef99cb18600e3e39f31830808623 100644
--- a/webkit/renderer/compositor_bindings/web_animation_impl.cc
+++ b/webkit/renderer/compositor_bindings/web_animation_impl.cc
@@ -7,6 +7,7 @@
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/animation_id_provider.h"
+#include "cc/base/time_util.h"
 #include "third_party/WebKit/public/platform/WebAnimation.h"
 #include "third_party/WebKit/public/platform/WebAnimationCurve.h"
 #include "webkit/renderer/compositor_bindings/web_filter_animation_curve_impl.h"
@@ -16,6 +17,7 @@
 
 using cc::Animation;
 using cc::AnimationIdProvider;
+using cc::TimeUtil;
 
 using blink::WebAnimation;
 using blink::WebAnimationCurve;
@@ -81,18 +83,21 @@ int WebAnimationImpl::iterations() const { return animation_->iterations(); }
 
 void WebAnimationImpl::setIterations(int n) { animation_->set_iterations(n); }
 
-double WebAnimationImpl::startTime() const { return animation_->start_time(); }
+double WebAnimationImpl::startTime() const {
+  return TimeUtil::TicksInSecondsF(animation_->start_time());
+}
 
 void WebAnimationImpl::setStartTime(double monotonic_time) {
-  animation_->set_start_time(monotonic_time);
+  animation_->set_start_time(base::TimeTicks::FromInternalValue(
+      monotonic_time * base::Time::kMicrosecondsPerSecond));
 }
 
 double WebAnimationImpl::timeOffset() const {
-  return animation_->time_offset();
+  return animation_->time_offset().InSecondsF();
 }
 
 void WebAnimationImpl::setTimeOffset(double monotonic_time) {
-  animation_->set_time_offset(monotonic_time);
+  animation_->set_time_offset(base::TimeDelta::FromSeconds(monotonic_time));
 }
 
 #if WEB_ANIMATION_SUPPORTS_FULL_DIRECTION