It was correct (but really ugly) prior to the combining of APIEntryShim and JSLock, but now it ends up overwriting the IdentifierTable.
<rdar://problem/15511394>
Created attachment 226073 [details] Patch
Comment on attachment 226073 [details] Patch r=me
Comment on attachment 226073 [details] Patch Clearing flags on attachment: 226073 Committed r165244: <http://trac.webkit.org/changeset/165244>
All reviewed patches have been landed. Closing bug.