Remove the CSSOM.

sky/engine/core/css/PropertySetCSSStyleDeclaration.h

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #ifndef SKY_ENGINE_CORE_CSS_PROPERTYSETCSSSTYLEDECLARATION_H_
 #define SKY_ENGINE_CORE_CSS_PROPERTYSETCSSSTYLEDECLARATION_H_
 
 #include "sky/engine/core/css/CSSStyleDeclaration.h"
 #include "sky/engine/wtf/HashMap.h"
 #include "sky/engine/wtf/OwnPtr.h"
 
 namespace blink {
 
 class CSSProperty;
-class CSSRule;
 class CSSValue;
 class Element;
 class ExceptionState;
 class MutableStylePropertySet;
 class StyleSheetContents;
 
 class AbstractPropertySetCSSStyleDeclaration : public CSSStyleDeclaration {
 public:
     virtual Element* parentElement() const { return 0; }
     StyleSheetContents* contextStyleSheet() const;
 
 private:
-    virtual CSSRule* parentRule() const override { return 0; }
     virtual unsigned length() const override final;
     virtual String item(unsigned index) const override final;
     virtual PassRefPtr<CSSValue> getPropertyCSSValue(const String& propertyName) override final;
     virtual String getPropertyValue(const String& propertyName) override final;
     virtual String getPropertyPriority(const String& propertyName) override final;
     virtual String getPropertyShorthand(const String& propertyName) override final;
     virtual bool isPropertyImplicit(const String& propertyName) override final;
     virtual void setProperty(const String& propertyName, const String& value, const String& priority, ExceptionState&) override final;
     virtual String removeProperty(const String& propertyName, ExceptionState&) override final;
     virtual String cssText() const override final;
@@ skipping 24 matching lines @@
     virtual void ref() override;
     virtual void deref() override;
 #endif
 
 protected:
     virtual MutableStylePropertySet& propertySet() const override final { ASSERT(m_propertySet); return *m_propertySet; }
 
     RawPtr<MutableStylePropertySet> m_propertySet; // Cannot be null
 };
 
-class StyleRuleCSSStyleDeclaration final : public PropertySetCSSStyleDeclaration
-{
-public:
-    static PassRefPtr<StyleRuleCSSStyleDeclaration> create(MutableStylePropertySet& propertySet, CSSRule* parentRule)
-    {
-        return adoptRef(new StyleRuleCSSStyleDeclaration(propertySet, parentRule));
-    }
-
-#if !ENABLE(OILPAN)
-    void clearParentRule() { m_parentRule = nullptr; }
-
-    virtual void ref() override;
-    virtual void deref() override;
-#endif
-
-    void reattach(MutableStylePropertySet&);
-
-private:
-    StyleRuleCSSStyleDeclaration(MutableStylePropertySet&, CSSRule*);
-    virtual ~StyleRuleCSSStyleDeclaration();
-
-    virtual CSSStyleSheet* parentStyleSheet() const override;
-
-    virtual CSSRule* parentRule() const override { return m_parentRule;  }
-
-    virtual void willMutate() override;
-    virtual void didMutate(MutationType) override;
-
-#if !ENABLE(OILPAN)
-    unsigned m_refCount;
-#endif
-    RawPtr<CSSRule> m_parentRule;
-};
-
 class InlineCSSStyleDeclaration final : public AbstractPropertySetCSSStyleDeclaration
 {
 public:
     explicit InlineCSSStyleDeclaration(Element* parentElement)
         : m_parentElement(parentElement)
     {
     }
 
 private:
     virtual MutableStylePropertySet& propertySet() const override;
 #if !ENABLE(OILPAN)
     virtual void ref() override;
     virtual void deref() override;
 #endif
     virtual CSSStyleSheet* parentStyleSheet() const override;
     virtual Element* parentElement() const override { return m_parentElement; }
 
     virtual void didMutate(MutationType) override;
 
     RawPtr<Element> m_parentElement;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_CSS_PROPERTYSETCSSSTYLEDECLARATION_H_