[ios-sim-wk2] perf/document-contains.html is a flaky timeout The test intermittently times out with no output on iOS simulator debug and release WK2 <https://build.webkit.org/results/Apple%20iOS%209%20Simulator%20Debug%20WK2%20(Tests)/r198529%20(443)/results.html> <http://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=perf%2Fdocument-contains.html>
Marked as flaky in <http://trac.webkit.org/projects/webkit/changeset/198533>