Polymer/core-header-panel — pull request #16 by ebidel (2014-10-03 19:41:56+00:00)
Title: config may not be set

This fixes an error I was seeing in core-component-page where core-header-panel gets the distributed nodes, expects a toolbar, but https://github.com/Polymer/core-doc-viewer/blob/master/elements/core-doc-page.html#L33 has been commented out.