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

cc/trees/layer_tree_impl.h

Index: cc/trees/layer_tree_impl.h
diff --git a/cc/trees/layer_tree_impl.h b/cc/trees/layer_tree_impl.h
index 56140350b2d03c17ef281c7bb9d313fed7028a61..ccc573c036986e70a071a00c9edb8f107330efc2 100644
--- a/cc/trees/layer_tree_impl.h
+++ b/cc/trees/layer_tree_impl.h
@@ -412,9 +412,8 @@ class CC_EXPORT LayerTreeImpl {
   bool HasPotentiallyRunningOpacityAnimation(const LayerImpl* layer) const;
   bool HasPotentiallyRunningTransformAnimation(const LayerImpl* layer) const;
 
-  bool HasAnyAnimationTargetingProperty(
-      const LayerImpl* layer,
-      Animation::TargetProperty property) const;
+  bool HasAnyAnimationTargetingProperty(const LayerImpl* layer,
+                                        AnimationTargetProperty property) const;
 
   bool FilterIsAnimatingOnImplOnly(const LayerImpl* layer) const;
   bool OpacityIsAnimatingOnImplOnly(const LayerImpl* layer) const;