When scrolled after requested repaints, rendering is broken because of wrong dirty area.
Created attachment 222184 [details] Patch
Comment on attachment 222184 [details] Patch Thanks.
Comment on attachment 222184 [details] Patch Clearing flags on attachment: 222184 Committed r162762: <http://trac.webkit.org/changeset/162762>
All reviewed patches have been landed. Closing bug.