Reviewed by Adam Barth.

        Fetch pointers to C++ DOM window immediately from holder
        object (do not search prototype chain for proper JS wrapper).
        https://bugs.webkit.org/show_bug.cgi?id=29031

        * bindings/scripts/CodeGeneratorV8.pm:
        * bindings/v8/V8DOMWrapper.cpp:
        (WebCore::V8DOMWrapper::getTemplate):
        * bindings/v8/V8Proxy.cpp:
        (WebCore::V8Proxy::createNewContext):
        (WebCore::V8Proxy::installDOMWindow):
        * bindings/v8/custom/V8DOMWindowCustom.cpp:
        (WebCore::ACCESSOR_GETTER):
        (WebCore::ACCESSOR_SETTER):
        (WebCore::INDEXED_PROPERTY_GETTER):
        (WebCore::NAMED_PROPERTY_GETTER):
        (WebCore::NAMED_ACCESS_CHECK):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@49248 268f45cc-cd09-0410-ab3c-d52691b4dbfc