PropertyNameArray used to switch between Vector and HashMap backing store. It was lost in the for-in refactoring. We can bring it back for a speedup.
Created attachment 252866 [details] Patch
Comment on attachment 252866 [details] Patch r=me
Comment on attachment 252866 [details] Patch Clearing flags on attachment: 252866 Committed r184120: <http://trac.webkit.org/changeset/184120>
All reviewed patches have been landed. Closing bug.