The fast/forms/search-vertical-alignment.html layout test is failing on GTK since r181292 (http://trac.webkit.org/changeset/181292). This revision changes the expected file on mac platform so we could probably do the same in GTK. The diff is the following: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r181476%20%286927%29/fast/forms/search-vertical-alignment-pretty-diff.html
fast/forms/textfield-overflow-by-value-update.html is also failing after the same revision. The diff is the following: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r181476%20%286927%29/fast/forms/textfield-overflow-by-value-update-pretty-diff.html Sorry about the noise