Reviewed by Adele.

    Reviewed by Adele.

        <rdar://problem/4619663> REGRESSION (NativePopup): Popup menu doesn't draw at the correct vertical position (9816)

        * platform/mac/PopupMenuMac.mm:
        (WebCore::PopupMenu::show): Make a temporary dummy view with the
        passed in rect, since AppKit will use the view bounds to determine
        what area to exclude when popping up a menu moved to the top of
        the screen.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@20006 268f45cc-cd09-0410-ab3c-d52691b4dbfc