There's a bunch of tests that have been failing on win7 forever. I'll suppress the failures for now in order to green up the bot. Most of the failures are probably just rebaselines.
Committed r83387: <http://trac.webkit.org/changeset/83387>
Committed r83393: <http://trac.webkit.org/changeset/83393>
Committed r83478: <http://trac.webkit.org/changeset/83478>