Revert optimization to not wrap change notifications. This was causing a number of rendering tests to fail. Needs investigation, but possibly because wrapping calls ShadyDOM.flush, and this alters distribution timing which some tests may have inadvertently relied on.
Revert optimization to not wrap change notifications.
This was causing a number of rendering tests to fail. Needs investigation, but possibly because wrapping calls ShadyDOM.flush, and this alters distribution timing which some tests may have inadvertently relied on.

Polymer/polymer,Polymer/polymer,Polymer/polymer