Remove tons of OILPAN.

sky/engine/core/dom/TreeScopeStyleSheetCollection.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 40 matching lines @@
     void addStyleSheetCandidateNode(Node*, bool createdByParser);
     void removeStyleSheetCandidateNode(Node*, ContainerNode* scopingNode);
     bool hasStyleSheetCandidateNodes() const { return !m_styleSheetCandidateNodes.isEmpty(); }
 
     bool usesRemUnits() const { return m_usesRemUnits; }
 
     DocumentOrderedList& styleSheetCandidateNodes() { return m_styleSheetCandidateNodes; }
 
     void clearMediaQueryRuleSetStyleSheets();
 
-    virtual void trace(Visitor*) override;
-
 protected:
     explicit TreeScopeStyleSheetCollection(TreeScope&);
 
     Document& document() const { return treeScope().document(); }
     TreeScope& treeScope() const { return *m_treeScope; }
 
     enum StyleResolverUpdateType {
         Reconstruct,
         Reset,
         Additive
@@ skipping 20 matching lines @@
 protected:
     RawPtr<TreeScope> m_treeScope;
     bool m_usesRemUnits;
 
     DocumentOrderedList m_styleSheetCandidateNodes;
 };
 
 }
 
 #endif