CC should use TimeTicks and TimeDelta to represent time

cc/animation/animation_events.h

Index: cc/animation/animation_events.h
diff --git a/cc/animation/animation_events.h b/cc/animation/animation_events.h
index e0cf73645c9b5f1a44b4958c724a87c741e0d09b..e40ca3f633f455c4cf420a4a7303f2513db2bccf 100644
--- a/cc/animation/animation_events.h
+++ b/cc/animation/animation_events.h
@@ -21,13 +21,13 @@ struct CC_EXPORT AnimationEvent {
                  int layer_id,
                  int group_id,
                  Animation::TargetProperty target_property,
-                 double monotonic_time);
+                 base::TimeTicks monotonic_time);
 
   Type type;
   int layer_id;
   int group_id;
   Animation::TargetProperty target_property;
-  double monotonic_time;
+  base::TimeTicks monotonic_time;
   bool is_impl_only;
   float opacity;
   gfx::Transform transform;