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

cc/layers/layer.cc

Index: cc/layers/layer.cc
diff --git a/cc/layers/layer.cc b/cc/layers/layer.cc
index a9e59d35ed8007322e6961899eb8ad625c2e9b8a..9a3f6e62be53b29d105e31d8a7ddc888e3a3f848 100644
--- a/cc/layers/layer.cc
+++ b/cc/layers/layer.cc
@@ -1118,7 +1118,11 @@ bool Layer::AddAnimation(scoped_ptr <Animation> animation) {
 }
 
 void Layer::PauseAnimation(int animation_id, double time_offset) {
-  layer_animation_controller_->PauseAnimation(animation_id, time_offset);
+  layer_animation_controller_->PauseAnimation(
+      animation_id,
+      base::TimeTicks::FromInternalValue(time_offset *
+                                         base::Time::kMicrosecondsPerSecond) -
+          base::TimeTicks());
   SetNeedsCommit();
 }