<command> should be an HTMLUnknownElement and <basefont> should be an HTMLElement as per: - https://html.spec.whatwg.org/multipage/dom.html#elements-in-the-dom:element-interface
Created attachment 286465 [details] Patch
Comment on attachment 286465 [details] Patch Clearing flags on attachment: 286465 Committed r204647: <http://trac.webkit.org/changeset/204647>
All reviewed patches have been landed. Closing bug.