CC Animation: Expose TargetProperty enum to be aliased in Blink Platform.

cc/trees/property_tree_builder.cc

Index: cc/trees/property_tree_builder.cc
diff --git a/cc/trees/property_tree_builder.cc b/cc/trees/property_tree_builder.cc
index c159aaa7fab02f3b40ce4259bb323a8bd8decdba..551c9112f8fe0a9c9043f88e0d4160abfa782914 100644
--- a/cc/trees/property_tree_builder.cc
+++ b/cc/trees/property_tree_builder.cc
@@ -241,7 +241,7 @@ bool AddTransformNodeIfNeeded(
   // in the Finished state at tree-building time on the main thread is still in
   // the Running state right after commit on the compositor thread.
   const bool has_any_transform_animation =
-      layer->HasAnyAnimationTargetingProperty(Animation::TRANSFORM);
+      layer->HasAnyAnimationTargetingProperty(TargetProperty::TRANSFORM);
 
   const bool has_surface = created_render_surface;