Layout ref test fast/regions/nested-floated-region.html is failing since added in r163985 <http://trac.webkit.org/changeset/163985> Test output: http://build.webkit.org/results/EFL%20Linux%2064-bit%20Release%20WK2/r164023%20%2812894%29/fast/regions/nested-floated-region-diffs.html
Fixed in r164481 http://trac.webkit.org/changeset/164481