fast/forms/file/input-file-label.html has been very flaky since shortly before r99873. http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fforms%2Ffile%2Finput-file-label.html When it fails, the page is entirely blank. Even though those symptoms suggest it is likely the failure doesn't directly have to do with these tests, I don't have any leads and need to move on to other gardening tasks so assigning to the folks who added the test for investigation.
Created attachment 115140 [details] Patch
Committed r100267: <http://trac.webkit.org/changeset/100267>
It looks stable recently.
Marking test failures as WontFix. Bug is still accessible and recording in TestExpectations.