-rolled in patch for http://bugzilla.opendarwin.org/show_bug.cgi?id=3878

    -rolled in patch for bugzilla.opendarwin.org/show_bug.cgi?id=3878
        arguments object should be an object not an array

        Reviewed by mjs.

        * kjs/function.cpp:
        (KJS::ArgumentsImp::ArgumentsImp): now manually handles initialization
        we used to get for free by inheriting from ArrayInstanceImp
        * kjs/function.h: ArgumentsImp now inherits from ObjectImp
        * tests/mozilla/expected.html: updated expected test results

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9618 268f45cc-cd09-0410-ab3c-d52691b4dbfc