requestAnimationFrame doesn't have a hardware implementation, but there seems to be a fallback Timer implementaiton that's probably better than nothing.
Created attachment 127837 [details] Patch
Comment on attachment 127837 [details] Patch Clearing flags on attachment: 127837 Committed r108288: <http://trac.webkit.org/changeset/108288>
All reviewed patches have been landed. Closing bug.