Remove tons of OILPAN.

sky/engine/core/dom/StyleEngine.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 123 matching lines @@
     void markDocumentDirty();
 
     PassRefPtr<CSSStyleSheet> createSheet(Element*, const String& text, TextPosition startPosition, bool createdByParser);
     void removeSheet(StyleSheetContents*);
 
     void addScopedStyleResolver(const ScopedStyleResolver* resolver) { m_scopedStyleResolvers.add(resolver); }
     void removeScopedStyleResolver(const ScopedStyleResolver* resolver) { m_scopedStyleResolvers.remove(resolver); }
     bool hasOnlyScopedResolverForDocument() const { return m_scopedStyleResolvers.size() == 1; }
     void collectScopedStyleFeaturesTo(RuleFeatureSet&) const;
 
-    virtual void trace(Visitor*) override;
-
 private:
     // CSSFontSelectorClient implementation.
     virtual void fontsNeedUpdate(CSSFontSelector*) override;
 
 private:
     StyleEngine(Document&);
 
     TreeScopeStyleSheetCollection* ensureStyleSheetCollectionFor(TreeScope&);
     TreeScopeStyleSheetCollection* styleSheetCollectionFor(TreeScope&);
     bool shouldUpdateDocumentStyleSheetCollection(StyleResolverUpdateMode) const;
@@ skipping 46 matching lines @@
 
     RefPtr<CSSFontSelector> m_fontSelector;
 
     HashMap<AtomicString, RawPtr<StyleSheetContents> > m_textToSheetCache;
     HashMap<RawPtr<StyleSheetContents>, AtomicString> m_sheetToTextCache;
 };
 
 }
 
 #endif