Expose ValidityState on the global Window object: https://html.spec.whatwg.org/#validitystate Firefox and Chrome match the specification.
Created attachment 270089 [details] Patch
Comment on attachment 270089 [details] Patch Clearing flags on attachment: 270089 Committed r195731: <http://trac.webkit.org/changeset/195731>
All reviewed patches have been landed. Closing bug.