Reviewed by Adam.

        Bug 10923: Frame scroll layout test failures on the buildbot
        http://bugzilla.opendarwin.org/show_bug.cgi?id=10923

        Made this test call layoutTestController.dumpChildFrameScrollPositions().

        * fast/overflow/scrollRevealButton-expected.txt:
        * fast/overflow/scrollRevealButton.html:

WebKitTools:

        Reviewed by Adam.

        Bug 10923: Frame scroll layout test failures on the buildbot
        http://bugzilla.opendarwin.org/show_bug.cgi?id=10923
        
        Added a new method that will toggle on the recursive dump of
        child frame scroll positions.
 
        * DumpRenderTree/DumpRenderTree.m:
        (dumpFrameScrollPosition):
        (+[LayoutTestController isSelectorExcludedFromWebScript:]):
        (-[LayoutTestController dumpChildFrameScrollPositions]):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@16503 268f45cc-cd09-0410-ab3c-d52691b4dbfc