- Make HTMLFrameOwnerElement::contentWindow() return a DOMWindow instead of a Frame
        - Remove the unnecessary hack in HTMLFrameElement.idl and HTMLIFrameElement.idl that
          converted from Frame to Window now that it is not necessary.
        - Remove now unused [NullCheck] extended attribute from CodeGeneratorJS.pm.

        * bindings/scripts/CodeGeneratorJS.pm:
        * html/HTMLDocument.idl:
        * html/HTMLFrameElement.idl:
        * html/HTMLFrameOwnerElement.cpp:
        (WebCore::HTMLFrameOwnerElement::contentWindow):
        * html/HTMLFrameOwnerElement.h:
        * html/HTMLIFrameElement.idl:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@24362 268f45cc-cd09-0410-ab3c-d52691b4dbfc