- Test for http://bugzilla.opendarwin.org/show_bug.cgi?id=9113
        REGRESSION (14581): XMLHttpRequest never calls onreadystatechange with 
        a readystate == 4

        * http/tests/xmlhttprequest/event-listener-gc.html: Added.
        * http/tests/xmlhttprequest/event-listener-gc-expected.txt: Added.

WebCore:

        Fix by Mitz. Reviewed, tweaked, tested, landed by me.

        - Fixed http://bugzilla.opendarwin.org/show_bug.cgi?id=9113
        REGRESSION (14581): XMLHttpRequest never calls onreadystatechange with 
        a readystate == 4
        
        An XMLHttpRequest must be added to the DOMObject cache so that its
        DOM implementation object can protect it, and by extension, its event
        listeners.
        
        This design seems slightly backwards to me -- the bindings should know
        about the DOM, not the other way around -- but I'm restoring it for
        now to fix the regression.
        
        * bindings/js/JSXMLHttpRequest.cpp:
        (KJS::JSXMLHttpRequest::JSXMLHttpRequest):
        (KJS::JSXMLHttpRequest::~JSXMLHttpRequest):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@14671 268f45cc-cd09-0410-ab3c-d52691b4dbfc