The following layout test is failing on GTK since it was added on r175843 <http://trac.webkit.org/r175843> fast/text/space-width.html The diff is: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r177057%20%284753%29/fast/text/space-width-diffs.html
passing since r238730 closing bug and updating expectation