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

Source/core/css/StyleRule.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * 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.
  *
@@ skipping 341 matching lines @@
 void StyleRuleGroup::wrapperInsertRule(unsigned index, PassRefPtr<StyleRuleBase> rule)
 {
     m_childRules.insert(index, rule);
 }
 
 void StyleRuleGroup::wrapperRemoveRule(unsigned index)
 {
     m_childRules.remove(index);
 }
 
-StyleRuleMedia::StyleRuleMedia(PassRefPtr<MediaQuerySet> media, Vector<RefPtr<StyleRuleBase> >& adoptRules)
+StyleRuleMedia::StyleRuleMedia(PassRefPtrWillBeRawPtr<MediaQuerySet> media, Vector<RefPtr<StyleRuleBase> >& adoptRules)
     : StyleRuleGroup(Media, adoptRules)
     , m_mediaQueries(media)
 {
 }
 
 StyleRuleMedia::StyleRuleMedia(const StyleRuleMedia& o)
     : StyleRuleGroup(o)
 {
     if (o.m_mediaQueries)
         m_mediaQueries = o.m_mediaQueries->copy();
@@ skipping 63 matching lines @@
         m_properties = m_properties->mutableCopy();
     return toMutableStylePropertySet(m_properties);
 }
 
 void StyleRuleFilter::setProperties(PassRefPtr<StylePropertySet> properties)
 {
     m_properties = properties;
 }
 
 } // namespace WebCore