Oilpan: avoid invoking some no-op finalizers.

Source/core/css/MediaQueryListListener.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public License
  *  along with this library; see the file COPYING.LIB.  If not, write to
  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  *  Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/css/MediaQueryListListener.h"
 
 namespace blink {
 
 MediaQueryListListener::MediaQueryListListener()
 {
     // only for use by subclasses
 }
 
-MediaQueryListListener::~MediaQueryListListener()
-{
-}
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQueryListListener);
 
 }