c326893f6a
add OPTGROUP as an attribute template -- https://github.com/Polymer/mdv/commit/af1733d905ac96852357db5e7a78a63ba2a488fc template ref should check treeScope.getElementById -- https://github.com/Polymer/mdv/commit/7de0697e318bb001e1649005ec48eb294edad6e4 Use correct event type for checkbox bindings -- https://github.com/Polymer/mdv/commit/2c675cab75aea2ef3d1b981a616469587b9210fe Review URL: https://codereview.chromium.org//17917002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@24562 260f80e4-7a28-3924-810f-c04153c831b5