Track transform animation content readiness on TransformNode.

cc/trees/layer_tree_impl.cc

Index: cc/trees/layer_tree_impl.cc
diff --git a/cc/trees/layer_tree_impl.cc b/cc/trees/layer_tree_impl.cc
index ed0fbe49bfeca052c8c62c8780eff48a7d177abb..feec3a8516d66d5c7f1f7d8cf250bb2207382177 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -615,9 +615,6 @@ void LayerTreeImpl::SetTransformMutated(ElementId element_id,
                                                             transform))
     return;
 
-  if (LayerImpl* layer = LayerByElementId(element_id))
-    layer->set_was_ever_ready_since_last_transform_animation(false);

[wkorman, 2017/05/20 01:31:27]

This is now enacted via TransformTree::OnTransformAnimated elsewhere in this
patch.

-
   set_needs_update_draw_properties();
 }