The annotation says 'transfer none', but it's a newly created object that needs to be freed.
Created attachment 103492 [details] Patch
Comment on attachment 103492 [details] Patch r=me
Comment on attachment 103492 [details] Patch Clearing flags on attachment: 103492 Committed r92771: <http://trac.webkit.org/changeset/92771>
All reviewed patches have been landed. Closing bug.