Revision r176864 <http://trac.webkit.org/r176864> added 21 tests. The following ones fail on platform GTK: Regressions: Unexpected image-only failures (9) fast/css/data-attribute-style-sharing-5.html [ ImageOnlyFailure ] fast/css/data-attribute-style-sharing-6.html [ ImageOnlyFailure ] fast/css/data-attribute-style-sharing-7.html [ ImageOnlyFailure ] fast/css/readonly-attribute-style-sharing-5.html [ ImageOnlyFailure ] fast/css/readonly-attribute-style-sharing-6.html [ ImageOnlyFailure ] fast/css/readonly-attribute-style-sharing-7.html [ ImageOnlyFailure ] fast/css/type-attribute-style-sharing-5.html [ ImageOnlyFailure ] fast/css/type-attribute-style-sharing-6.html [ ImageOnlyFailure ] fast/css/type-attribute-style-sharing-7.html [ ImageOnlyFailure ] That is, the ones that end in {5,6,7}. The diffs are: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/data-attribute-style-sharing-5-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/data-attribute-style-sharing-6-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/data-attribute-style-sharing-7-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/readonly-attribute-style-sharing-5-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/readonly-attribute-style-sharing-6-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/readonly-attribute-style-sharing-7-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/type-attribute-style-sharing-5-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/type-attribute-style-sharing-6-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r176893%20%284655%29/fast/css/type-attribute-style-sharing-7-diffs.html
Marked accordingly on the GTK expectations on https://trac.webkit.org/r176922
This started to pass after the freetype upgrade in r221670