Test: fast/js/toString-exception.html

        Reviewed by Maciej.

        - fix http://bugzilla.opendarwin.org/show_bug.cgi?id=7343
          REGRESSION: fast/js/toString-overrides.html fails when run multiple times

        * kjs/array_object.cpp:
        (ArrayProtoFunc::callAsFunction): Remove the object from the visited elements set before
        returning an error.

LayoutTests:

        Reviewed by Maciej.

        - test for http://bugzilla.opendarwin.org/show_bug.cgi?id=7343
          REGRESSION: fast/js/toString-overrides.html fails when run multiple times

        * fast/js/resources/toString-exception.js: Added.
        * fast/js/toString-exception-expected.txt: Added.
        * fast/js/toString-exception.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@12890 268f45cc-cd09-0410-ab3c-d52691b4dbfc