Remove Layer{Impl}::TransformIsAnimating.

cc/layers/layer.cc

Index: cc/layers/layer.cc
diff --git a/cc/layers/layer.cc b/cc/layers/layer.cc
index 10bc5221ba4178374d50804f71c4d22b8475484a..f496d6967c0c924e8beee6772d3730125ca960a4 100644
--- a/cc/layers/layer.cc
+++ b/cc/layers/layer.cc
@@ -1301,11 +1301,6 @@ void Layer::SetScrollbarsHiddenFromImplSide(bool hidden) {
     inputs_.client->didChangeScrollbarsHidden(hidden);
 }
 
-bool Layer::TransformIsAnimating() const {
-  return GetMutatorHost()->IsAnimatingTransformProperty(
-      element_id(), GetElementTypeForAnimation());
-}
-
 gfx::ScrollOffset Layer::ScrollOffsetForAnimation() const {
   return CurrentScrollOffset();
 }