only run dart2js on polymer bootstrap files
only run dart2js on polymer bootstrap files

ronlobo/core-elements,dart-archive/core-elements,ronlobo/core-elements,orgsea/core-elements,orgsea/core-elements,dart-archive/core-elements,ronlobo/core-elements,orgsea/core-elements,ronlobo/core-elements,dart-archive/core-elements,dart-archive/core-elements,orgsea/core-elements