The following layout test are failing since they were added on r179027 (http://trac.webkit.org/r179027). * fast/multicol/pagination/LeftToRight-tb-hittest.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r179921%20%286127%29/fast/multicol/pagination/LeftToRight-tb-hittest-pretty-diff.html * fast/multicol/pagination/RightToLeft-rl-hittest.html https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r179921%20%286127%29/fast/multicol/pagination/RightToLeft-rl-hittest-pretty-diff.html