The following layout test is failing on Win
Probable cause: unknown.
Actually, it's across several platforms.
Created attachment 182380 [details]
This test is probably going to be slow, so marked it as such. Turned down the number of iterations and made it easier to adjust that number in the future.
Created attachment 182381 [details]
Rebased to top of tree
Committed r139504: <http://trac.webkit.org/changeset/139504>