HTMLTableElement.tHead / tFoot / caption should be nullable as per the specification: https://html.spec.whatwg.org/multipage/tables.html#htmltableelement Setting those to null in WebKit will nullify them but it will then throw a "NotFoundError: DOM Exception 8" due to an implementation bug.
Created attachment 260831 [details] Patch
Created attachment 260832 [details] Patch
Comment on attachment 260832 [details] Patch Clearing flags on attachment: 260832 Committed r189537: <http://trac.webkit.org/changeset/189537>
All reviewed patches have been landed. Closing bug.