Like on Mac this test also times out on Windows, I'd imagine for similar reasons.
Test was added to Mac skiplist: http://trac.webkit.org/changeset/102884
Adding to Windows skip list as well.
Created attachment 157592 [details]
Comment on attachment 157592 [details]
Clearing flags on attachment: 157592
Committed r125233: <http://trac.webkit.org/changeset/125233>
All reviewed patches have been landed. Closing bug.