Explicitly call DestroyWindow on the tooltip.
        Destroying its parent won't destroy the tooltip, since it not a WS_CHILD style window.

        Reviewed by Ada Chan.

        * WebView.cpp:
        (WebView::~WebView):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@31655 268f45cc-cd09-0410-ab3c-d52691b4dbfc