See http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=http%2Ftests%2Fincremental%2Fslow-utf8-text.pl%20&group=%40ToT%20-%20chromium.org
It even has "slow" in the name!
probably not an issue for non-chromium bots, and no longer an issue for chromium.