Reviewed by Oliver Hunt.

    Reviewed by Oliver Hunt.

        Fix for http://bugs.webkit.org/show_bug.cgi?id=17504
        Speed up DOM lists array subscription syntax by using the fast
        getOwnPropertySlot and set paths

        - 6x speed improvement on Oliver's ImageData put test.

        * bindings/scripts/CodeGeneratorJS.pm: Add fast path for getOwnPropertySlot
        and put when an indexGetter or indexSetter is used.  We can not use the fast
        path if an overridingNameGetter is used as there would be no way to override.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@30529 268f45cc-cd09-0410-ab3c-d52691b4dbfc