The fast/forms/button-line-height.html layout test is failing on GTK+ since it was added on revision r183366 (http://trac.webkit.org/changeset/r183366) https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r183744%20%288238%29/fast/forms/button-line-height-diffs.html
*** This bug has been marked as a duplicate of bug 144673 ***