Ensure proper finalization of garbage-collected types.

Source/core/css/MediaQueryList.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
@@ skipping 23 matching lines @@
 
 MediaQueryList::MediaQueryList(PassRefPtrWillBeRawPtr<MediaQueryMatcher> vector, PassRefPtrWillBeRawPtr<MediaQuerySet> media, bool matches)
     : m_matcher(vector)
     , m_media(media)
     , m_evaluationRound(m_matcher->evaluationRound())
     , m_changeRound(m_evaluationRound - 1) // m_evaluationRound and m_changeRound initial values must be different.
     , m_matches(matches)
 {
 }
 
-MediaQueryList::~MediaQueryList()
-{
-}
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQueryList)
 
 String MediaQueryList::media() const
 {
     return m_media->mediaText();
 }
 
 void MediaQueryList::addListener(PassRefPtrWillBeRawPtr<MediaQueryListListener> listener)
 {
     if (!listener)
         return;
@@ skipping 34 matching lines @@
     return m_matches;
 }
 
 void MediaQueryList::trace(Visitor* visitor)
 {
     visitor->trace(m_matcher);
     visitor->trace(m_media);
 }
 
 }