plugins/invalidate_rect.html has been failing on Windows since it was landed. http://build.webkit.org/results/Windows%207%20Release%20(Tests)/r78072%20(9186)/plugins/invalidate_rect-pretty-diff.html
Looks like this was fixed in http://trac.webkit.org/changeset/78359: http://build.webkit.org/builders/Windows%207%20Release%20%28Tests%29/builds/9288 http://build.webkit.org/results/Windows%207%20Release%20(Tests)/r78359%20(9289)/plugins/invalidate_rect-pretty-diff.html I will remove the failing expected results shortly.
Removed the failing results in r78364: http://trac.webkit.org/changeset/78364