InlinedVisitor: Migrate css to use inlined tracing

Source/core/css/StyleSheetContents.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 140 matching lines @@
     void setHasMediaQueries();
     bool hasMediaQueries() const { return m_hasMediaQueries; }
 
     bool didLoadErrorOccur() const { return m_didLoadErrorOccur; }
 
     void shrinkToFit();
     RuleSet& ruleSet() { ASSERT(m_ruleSet); return *m_ruleSet.get(); }
     RuleSet& ensureRuleSet(const MediaQueryEvaluator&, AddRuleFlags);
     void clearRuleSet();
 
-    void trace(Visitor*);
+    DECLARE_TRACE();
 
 private:
     StyleSheetContents(StyleRuleImport* ownerRule, const String& originalURL, const CSSParserContext&);
     StyleSheetContents(const StyleSheetContents&);
     void notifyRemoveFontFaceRule(const StyleRuleFontFace*);
 
     Document* clientSingleOwnerDocument() const;
 
     RawPtrWillBeMember<StyleRuleImport> m_ownerRule;
 
@@ skipping 17 matching lines @@
 
     WillBeHeapHashSet<RawPtrWillBeWeakMember<CSSStyleSheet> > m_loadingClients;
     WillBeHeapHashSet<RawPtrWillBeWeakMember<CSSStyleSheet> > m_completedClients;
 
     OwnPtrWillBeMember<RuleSet> m_ruleSet;
 };
 
 } // namespace
 
 #endif