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

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 453c75f916e73eecb44da3a54a2a9851281e0ddb..9c6ae943f7948196f64c261bcda21e97b14fa20a 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -397,9 +397,8 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
   bool HasOnlyTranslationTransforms(const Layer* layer) const;
   bool MaximumTargetScale(const Layer* layer, float* max_scale) const;
   bool AnimationStartScale(const Layer* layer, float* start_scale) const;
-  bool HasAnyAnimationTargetingProperty(
-      const Layer* layer,
-      Animation::TargetProperty property) const;
+  bool HasAnyAnimationTargetingProperty(const Layer* layer,
+                                        AnimationTargetProperty property) const;
   bool AnimationsPreserveAxisAlignment(const Layer* layer) const;
   bool HasAnyAnimation(const Layer* layer) const;
   bool HasActiveAnimation(const Layer* layer) const;