Use is<>() / downcast<>() for FontData subclasses
Created attachment 239591 [details] Patch
Comment on attachment 239591 [details] Patch r=me
Comment on attachment 239591 [details] Patch Clearing flags on attachment: 239591 Committed r174558: <http://trac.webkit.org/changeset/174558>
All reviewed patches have been landed. Closing bug.