The imported/mozilla/svg/objectBoundingBox-and-mask.svg layout test is failing on GTK+ after revision r183661 (http://trac.webkit.org/changeset/183661). The diff is the following: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r183744%20%288238%29/imported/mozilla/svg/objectBoundingBox-and-mask-diffs.html
More test are failina after revision r183661: imported/mozilla/svg/text/mask-applied.svg https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r183744%20%288238%29/imported/mozilla/svg/text/mask-applied-diffs.html svg/masking/mask-negative-scale.svg https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r183744%20%288238%29/svg/masking/mask-negative-scale-diffs.html
The tests are passing now.