The transforms/2d/preserve3d-not-fixed-container.html layout test is flaky on GTK+. It fails very ocasionally.
When it does the error is the following: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20%28Tests%29/r183744%20%288238%29/transforms/2d/preserve3d-not-fixed-container-diffs.html
The test(s) filed under this bug have been consistently passing for the last 4000 revisions. Marking bug as fixed.
Committed r263254: <https://trac.webkit.org/changeset/263254>