The following layout test is failing on Mac and Win following platform/chromium/virtual/gpu/compositedscrolling/overflow/composited-scrolling-paint-phases.html platform/chromium/virtual/softwarecompositing/overflow/composited-scrolling-paint-phases.html Probable cause: http://trac.webkit.org/changeset/145067
rebaselined in http://trac.webkit.org/changeset/145124. Please verify, vollick.