cc : Track transform animation changes on transform tree

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index 36215af941ac7202ec70c84e3d80a32f6eef93c8..b5c13248de666c129f54a0fffd85d13fea37dd6f 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -95,7 +95,8 @@ class CC_EXPORT LayerImpl {
   void OnOpacityAnimated(float opacity);
   void OnTransformAnimated(const gfx::Transform& transform);
   void OnScrollOffsetAnimated(const gfx::ScrollOffset& scroll_offset);
-  void OnTransformIsPotentiallyAnimatingChanged(bool is_animating);
+  void OnTransformIsCurrentlyAnimatingChanged(bool is_currently_animating);
+  void OnTransformIsPotentiallyAnimatingChanged(bool has_potential_animation);
   void OnOpacityIsCurrentlyAnimatingChanged(bool is_currently_animating);
   void OnOpacityIsPotentiallyAnimatingChanged(bool has_potential_animation);
   bool IsActive() const;