Check the preference, not the compile flag.
Created attachment 227303 [details] Proposed patch.
Comment on attachment 227303 [details] Proposed patch. r=me
Comment on attachment 227303 [details] Proposed patch. Clearing flags on attachment: 227303 Committed r165971: <http://trac.webkit.org/changeset/165971>
All reviewed patches have been landed. Closing bug.