Remove HTMLStyleElement::scopingNode().

sky/engine/core/html/HTMLStyleElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2010 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 20 matching lines @@
 
 class ContainerNode;
 class Document;
 
 class HTMLStyleElement final : public HTMLElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtr<HTMLStyleElement> create(Document&);
     virtual ~HTMLStyleElement();
 
-    ContainerNode* scopingNode();
-
     CSSStyleSheet* sheet() const { return m_sheet.get(); }
 
     const AtomicString& media() const;
 
 private:
     HTMLStyleElement(Document&);
 
     void process();
     void clearSheet();
 
     // overload from HTMLElement
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
     virtual void insertedInto(ContainerNode*) override;
     virtual void removedFrom(ContainerNode*) override;
     virtual void childrenChanged(const ChildrenChange&) override;
 
     RefPtr<CSSStyleSheet> m_sheet;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_HTML_HTMLSTYLEELEMENT_H_