svg/dom/SVGPolygonElement-baseVal-list-removal-crash.html flakily times out on WebKit2 very often: http://webkit-test-results.appspot.com/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=svg%2Fdom%2FSVGPolygonElement-baseVal-list-removal-crash.html
Marked flaky in <http://trac.webkit.org/r162383>.
This doesn't appear to happen any more.