If the over-scroll image doesn't match the surface size, it should be tiled.
Created attachment 140722 [details] Patch
Comment on attachment 140722 [details] Patch Looks good.
Comment on attachment 140722 [details] Patch Clearing flags on attachment: 140722 Committed r116429: <http://trac.webkit.org/changeset/116429>
All reviewed patches have been landed. Closing bug.