Reviewed by Sam Weinig.

        [V8] Move to DOMWindow::setLocation
        https://bugs.webkit.org/show_bug.cgi?id=50876

        Recently, JavaScriptCore moved to implementing setLocation in WebCore.
        This patch change V8 to use that common code path.  I haven't removed
        the old code path because it's still used for other things (like
        assigning window.location.href), but I'll move the rest over in a
        future patch.

        * bindings/v8/custom/V8DOMWindowCustom.cpp:
        (WebCore::V8DOMWindow::locationAccessorSetter):
        * bindings/v8/specialization/V8BindingState.cpp:
        (WebCore::::getFirstWindow):
        * bindings/v8/specialization/V8BindingState.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@73864 268f45cc-cd09-0410-ab3c-d52691b4dbfc