So modifying FontSelector does not trigger world rebuild via Document.h.
Created attachment 276715 [details] patch
Created attachment 276716 [details] patch
Created attachment 276717 [details] patch
Comment on attachment 276717 [details] patch Clearing flags on attachment: 276717 Committed r199722: <http://trac.webkit.org/changeset/199722>
All reviewed patches have been landed. Closing bug.