[CSS3 Backgrounds and Borders] Remove CSS3_BACKGROUND feature flag.
Created attachment 178528 [details] Patch
Comment on attachment 178528 [details] Patch r=me, as per webkit-dev discussion.
Comment on attachment 178528 [details] Patch Clearing flags on attachment: 178528 Committed r137166: <http://trac.webkit.org/changeset/137166>
All reviewed patches have been landed. Closing bug.