http/tests/images/draw-pattern-slow-load-large-image.html [ Timeout Pass ] The test times out frequently on the first run. It was passing fine until r233902, where it timed out for the first time, but the changeset doesn't seem related to the test. There isn't more information available about the problem.
There are no references to this bug in any TestExpectations. It's probable this bug was solved at some point but it wasn't marked as closed. I'm closing this bug now. If you think this bug report is still valid, please reopen it and add an entry to TestExpectations.