The following layout test is failing on MacOS imported/mozilla/css-transitions/test_event-dispatch.html Probable cause: Unknown, earliest timeout on history is r236821. Issue has been happening for a time now. We need to regress this to its origin. Flakiness Dashboard: https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fmozilla%2Fcss-transitions%2Ftest_event-dispatch.html
<rdar://problem/45556688>
Checking the history shows no timeouts have happened in about a month. Issue seems to have resolved itself. marking issue resolved.