This is the or optimization from https://bugs.webkit.org/show_bug.cgi?id=133955 in a separate patch.
Created attachment 234012 [details] Patch
Comment on attachment 234012 [details] Patch r=me
Comment on attachment 234012 [details] Patch Clearing flags on attachment: 234012 Committed r170559: <http://trac.webkit.org/changeset/170559>
All reviewed patches have been landed. Closing bug.