Layout reftest compositing/images/positioned-image-content-rect.html is failing since introduced in r152986 <http://trac.webkit.org/changeset/152986> The difference is insignificant, it can be seen after increasing contrast of image diff. http://build.webkit.org/results/EFL%20Linux%2064-bit%20Release%20WK2/r160429%20%2811914%29/compositing/images/positioned-image-content-rect-diffs.html