The compositing/regions/region-as-layer-in-another-flowthread.html test shows image failures on the bots:
Marked as an Image failure in r157841.
Created attachment 214969 [details]
Comment on attachment 214969 [details]
Clearing flags on attachment: 214969
Committed r157860: <http://trac.webkit.org/changeset/157860>
All reviewed patches have been landed. Closing bug.