MutationObserver.observe should treat a null or undefined options argument as empty
Created attachment 149558 [details] Patch
Comment on attachment 149558 [details] Patch Might want to comment in the ChangeLog about why it's still a syntax error.
Created attachment 149564 [details] Patch for landing
Comment on attachment 149564 [details] Patch for landing Clearing flags on attachment: 149564 Committed r121278: <http://trac.webkit.org/changeset/121278>
All reviewed patches have been landed. Closing bug.