See https://build.webkit.org/results/Apple%20Win%207%20Release%20(Tests)/r182444%20(50912)/results.html for an example
Marked test as ImageOnlyFailure in r182448: <http://trac.webkit.org/changeset/182448>
Wait, what am I thinking. Content filtering is disabled on Windows. I just need to skip the http/tests/contentfiltering directory.
Skipped on Windows (and EFL) in r182594: <http://trac.webkit.org/changeset/182594>