The following layout test is flakily timing out in debug (see e.g. http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fevents%2Fkeydown-1.html&showExpectations=true ): fast/events/keydown-1.html From the log looks like sometimes window.frames[0].document.body is null when we try to look at it, which seems strange. Don't know how to triage this. Wondering if sometimes event handling is going awry in the test framework? Dirk, could you try to triage?
The test framework (NRWT) would have nothing to do with flakiness like this. I can poke into it, but I'm almost certainly not the best person to do so.