Layout tests fast/text/font-kerning.html and mathml/presentation/scripts-subsup.html are failing since they were modified on r180904 (http://trac.webkit.org/changeset/180904). The diffs are the following: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r180999%20%286665%29/fast/text/font-kerning-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r180999%20%286665%29/mathml/presentation/scripts-subsup-diffs.html
fast/text/font-kerning.html was rebaselined in r183802 <http://trac.webkit.org/changeset/183802>.
fast/text/font-kerning.html seems to be passing now.
Fixed per http://trac.webkit.org/changeset/202904