"background" should suggest "background-image" suggestions like "linear-gradient()", etc. Take this opportunity to update CSS Autocompletion in general.
<rdar://problem/17644898>
Created attachment 234776 [details] [PATCH] Proposed Fix
Comment on attachment 234776 [details] [PATCH] Proposed Fix Clearing flags on attachment: 234776 Committed r171011: <http://trac.webkit.org/changeset/171011>
All reviewed patches have been landed. Closing bug.