Remove the CSSOM.

sky/engine/core/css/CSSStyleSheet.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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SKY_ENGINE_CORE_CSS_CSSSTYLESHEET_H_
 #define SKY_ENGINE_CORE_CSS_CSSSTYLESHEET_H_
 
-#include "sky/engine/core/css/CSSRule.h"
 #include "sky/engine/core/css/StyleSheet.h"
 #include "sky/engine/platform/heap/Handle.h"
 #include "sky/engine/wtf/Noncopyable.h"
 #include "sky/engine/wtf/text/TextPosition.h"
 
 namespace blink {
 
 class BisonCSSParser;
-class CSSRule;
-class CSSRuleList;
 class CSSStyleSheet;
 class Document;
 class ExceptionState;
 class MediaQuerySet;
 class StyleSheetContents;
 
 enum StyleSheetUpdateType {
     PartialRuleUpdate,
     EntireStyleSheetUpdate
 };
 
 class CSSStyleSheet final : public StyleSheet {
-    DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtr<CSSStyleSheet> createInline(Node*, const KURL&, const TextPosition& startPosition = TextPosition::minimumPosition());
     static PassRefPtr<CSSStyleSheet> createInline(PassRefPtr<StyleSheetContents>, Node* ownerNode, const TextPosition& startPosition = TextPosition::minimumPosition());
 
     virtual ~CSSStyleSheet();
 
     virtual Node* ownerNode() const override { return m_ownerNode; }
-    virtual MediaList* media() const override;
 
-    PassRefPtr<CSSRuleList> cssRules();
-    unsigned insertRule(const String& rule, unsigned index, ExceptionState&);
-    unsigned insertRule(const String& rule, ExceptionState&); // Deprecated.
-    void deleteRule(unsigned index, ExceptionState&);
-
-    // IE Extensions
-    PassRefPtr<CSSRuleList> rules();
-    int addRule(const String& selector, const String& style, int index, ExceptionState&);
-    int addRule(const String& selector, const String& style, ExceptionState&);
-    void removeRule(unsigned index, ExceptionState& exceptionState) { deleteRule(index, exceptionState); }
-
-    // For CSSRuleList.
     unsigned length() const;
-    CSSRule* item(unsigned index);
 
     virtual void clearOwnerNode() override;
 
     virtual KURL baseURL() const override;
 
     Document* ownerDocument() const;
     MediaQuerySet* mediaQueries() const { return m_mediaQueries.get(); }
     void setMediaQueries(PassRefPtr<MediaQuerySet>);
 
     class RuleMutationScope {
         WTF_MAKE_NONCOPYABLE(RuleMutationScope);
         STACK_ALLOCATED();
     public:
         explicit RuleMutationScope(CSSStyleSheet*);
-        explicit RuleMutationScope(CSSRule*);
         ~RuleMutationScope();
 
     private:
         RawPtr<CSSStyleSheet> m_styleSheet;
     };
 
     void willMutateRules();
     void didMutateRules();
     void didMutate(StyleSheetUpdateType = PartialRuleUpdate);
 
-    void clearChildRuleCSSOMWrappers();
-
     StyleSheetContents* contents() const { return m_contents.get(); }
 
     bool isInline() const { return m_isInlineStylesheet; }
     TextPosition startPositionInSource() const { return m_startPosition; }
 
 private:
     CSSStyleSheet(PassRefPtr<StyleSheetContents>);
     CSSStyleSheet(PassRefPtr<StyleSheetContents>, Node* ownerNode, bool isInlineStylesheet, const TextPosition& startPosition);
 
     virtual bool isCSSStyleSheet() const override { return true; }
     virtual String type() const override { return "text/css"; }
 
-    void reattachChildRuleCSSOMWrappers();
-
     RefPtr<StyleSheetContents> m_contents;
     bool m_isInlineStylesheet;
     RefPtr<MediaQuerySet> m_mediaQueries;
 
     RawPtr<Node> m_ownerNode;
 
     TextPosition m_startPosition;
-    mutable RefPtr<MediaList> m_mediaCSSOMWrapper;
-    mutable Vector<RefPtr<CSSRule> > m_childRuleCSSOMWrappers;
-    mutable OwnPtr<CSSRuleList> m_ruleListCSSOMWrapper;
 };
 
 inline CSSStyleSheet::RuleMutationScope::RuleMutationScope(CSSStyleSheet* sheet)
     : m_styleSheet(sheet)
 {
     if (m_styleSheet)
         m_styleSheet->willMutateRules();
 }
 
-inline CSSStyleSheet::RuleMutationScope::RuleMutationScope(CSSRule* rule)
-    : m_styleSheet(rule ? rule->parentStyleSheet() : 0)
-{
-    if (m_styleSheet)
-        m_styleSheet->willMutateRules();
-}
-
 inline CSSStyleSheet::RuleMutationScope::~RuleMutationScope()
 {
     if (m_styleSheet)
         m_styleSheet->didMutateRules();
 }
 
 DEFINE_TYPE_CASTS(CSSStyleSheet, StyleSheet, sheet, sheet->isCSSStyleSheet(), sheet.isCSSStyleSheet());
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_CSS_CSSSTYLESHEET_H_