I think we just moved to using a atomic Boolean
Created attachment 313988 [details] patch
Comment on attachment 313988 [details] patch r=me
Comment on attachment 313988 [details] patch r=me too
Comment on attachment 313988 [details] patch Clearing flags on attachment: 313988 Committed r218866: <http://trac.webkit.org/changeset/218866>
All reviewed patches have been landed. Closing bug.