The following layout test is failing on Linux, XP, and Win7 platform/chromium/compositing/force-compositing-mode/overflow-iframe-layer.html Probable cause: http://trac.webkit.org/changeset/134197/? Doesn't make any sense.
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#showExpectations=true&tests=platform%2Fchromium%2Fcompositing%2Fforce-compositing-mode%2Foverflow-iframe-layer.html
The patch to bug 104273 will resolve this issue by the way.