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 bafbed15119f7efecc65793cd1447a7ed58b0d25..f9f1ba1d39c3b7fb6c4216128f53f75de759aa71 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,
+                                        TargetProperty::Type property) const;
 
   bool FilterIsAnimatingOnImplOnly(const LayerImpl* layer) const;
   bool OpacityIsAnimatingOnImplOnly(const LayerImpl* layer) const;