fast/workers/worker-crash-with-invalid-location.html, fast/workers/worker-event-listener.html have been failing on Windows 7 Release (Tests) since r88578. http://build.webkit.org/results/Windows%207%20Release%20(Tests)/r88576%20(13652)/results.html passed http://build.webkit.org/results/Windows%207%20Release%20(Tests)/r88578%20(13653)/results.html failed
fast/workers/worker-crash-with-invalid-location.html is covered by bug 62595.
And fast/workers/worker-event-listener.html seems to have been fixed at some point.