The fast/borders/border-painting-correctness-dashed.html and fast/borders/border-painting-correctness-dotted.html layout tests are failing on GTK since they were added on r177686 (trac.webkit.org/changeset/177686). https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20(Tests)/r180361%20%286373%29/fast/borders/border-painting-correctness-dotted-diffs.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20(Tests)/r180361%20%286373%29/fast/borders/border-painting-correctness-dashed-diffs.html