It conflicts with DOM2 Rect. http://www.w3.org/TR/2000/REC-DOM-Level-2-Style-20001113/css.html#CSS-Rect
Created attachment 172504 [details] Patch
Comment on attachment 172504 [details] Patch ok
Comment on attachment 172504 [details] Patch Clearing flags on attachment: 172504 Committed r133590: <http://trac.webkit.org/changeset/133590>
All reviewed patches have been landed. Closing bug.