WebKit is currently ignoring CORS for any font related stuff. As long as this is valid, CachedFont does not need to get updated before being reused.
Created attachment 288689 [details] Patch
Created attachment 289051 [details] Patch for landing
Comment on attachment 289051 [details] Patch for landing Clearing flags on attachment: 289051 Committed r206017: <http://trac.webkit.org/changeset/206017>
All reviewed patches have been landed. Closing bug.