Parameter to tr.deleteCell() should be mandatory: - https://html.spec.whatwg.org/multipage/tables.html#htmltablerowelement Firefox and Chrome agree with the specification.
Created attachment 284805 [details] Patch
Comment on attachment 284805 [details] Patch Clearing flags on attachment: 284805 Committed r203833: <http://trac.webkit.org/changeset/203833>
All reviewed patches have been landed. Closing bug.