Reviewed by Anders.

        This is a speculative fix for the failing layout test on the build 
        bot. It seems that the problem that the Build Bot is having is 
        Tiger-specific. On Tiger, [NSValue description] was not very smart. 
        So I replaced our call to description with a hand-rolled equivalent 
        that will match on both platforms. 

        * DumpRenderTree/mac/AccessibilityControllerMac.mm:
        (descriptionOfValue):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@34813 268f45cc-cd09-0410-ab3c-d52691b4dbfc