Reviewed by Jon Honeycutt.

        Added some asserts to catch undesirable usage of setWrapper and addChildren.

        * page/AccessibilityObject.cpp:
        (WebCore::AccessibilityObject::addChildren):
        * page/AccessibilityObject.h:
        (WebCore::AccessibilityObject::setWrapper):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@32030 268f45cc-cd09-0410-ab3c-d52691b4dbfc