Change various helper classes to transition types to get CSSValue entirely onto the gc heap.

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
  *  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/MediaQueryList.h"
 
 #include "core/css/MediaList.h"
 #include "core/css/MediaQueryEvaluator.h"
 #include "core/css/MediaQueryListListener.h"
 #include "core/css/MediaQueryMatcher.h"
 
 namespace WebCore {
 
-PassRefPtr<MediaQueryList> MediaQueryList::create(PassRefPtr<MediaQueryMatcher> vector, PassRefPtr<MediaQuerySet> media, bool matches)
+PassRefPtr<MediaQueryList> MediaQueryList::create(PassRefPtr<MediaQueryMatcher> vector, PassRefPtrWillBeRawPtr<MediaQuerySet> media, bool matches)
 {
     return adoptRef(new MediaQueryList(vector, media, matches));
 }
 
-MediaQueryList::MediaQueryList(PassRefPtr<MediaQueryMatcher> vector, PassRefPtr<MediaQuerySet> media, bool matches)
+MediaQueryList::MediaQueryList(PassRefPtr<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()
 {
@@ skipping 39 matching lines @@
 }
 
 bool MediaQueryList::matches()
 {
     if (m_evaluationRound != m_matcher->evaluationRound())
         setMatches(m_matcher->evaluate(m_media.get()));
     return m_matches;
 }
 
 }