The test fast/forms/control-clip-overflow.html says no scroll bar should be visible below the popup and the button.
After r151146 scroll bars appeared on all layout tester bot.
Skippen on Qt in http://trac.webkit.org/changeset/151163.
Please unskip it with proper fix.
Well, one thing I didn't check thoroughly enough was whether or not clearLayoutOverflow is now called too early (something else still accesses layoutOverflowRect between the time it's now called and when it used to be called).
Perhaps this means that clearLayoutOverflow should still just be called where it used to, which unfortunately requires spreading out the delayed scrolling logic a bit...but better than a test failing.
Also I didn't see this failure locally. Weird.
*** Bug 117207 has been marked as a duplicate of this bug. ***