Reviewed by Rob (yay!).

    Reviewed by Rob (yay!).

        http://bugs.webkit.org/show_bug.cgi?id=11640
        XMLHttpRequest produces undefined:undefined HTTP authentication

WebCore:
        * bindings/js/JSXMLHttpRequest.cpp:
        (KJS::JSXMLHttpRequestProtoFunc::callAsFunction):
        Treat undefined credentials as missing ones.

LayoutTests:
        * http/tests/xmlhttprequest/basic-auth-expected.txt:
        * http/tests/xmlhttprequest/basic-auth.html:
        Added tests for undefined.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@17842 268f45cc-cd09-0410-ab3c-d52691b4dbfc