Make fast/events/window-onerror2.html throw exception in deterministic order. The test now fails intermittently on Chromimum bots because order in which setTimeout callback and onload handler are invoked may change.
Created attachment 79598 [details]
Link to the flakiness dashboard: http://test-results.appspot.com/dashboards/flakiness_dashboard.html#master=Chromium&tests=fast/events/window-onerror2.html,inspector/console-tests.html
After this rolls in, someone should remove the downstream test expectations.
Committed r76244: <http://trac.webkit.org/changeset/76244>