[CSSTypedOM] Computed StylePropertyMap use ComputedStyle for Lengths

third_party/WebKit/Source/core/css/CSSComputedStyleDeclaration.h

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008, 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 Lesser 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,
@@ skipping 48 matching lines @@
   const CSSValue* getPropertyCSSValue(AtomicString customPropertyName) const;
   std::unique_ptr<HashMap<AtomicString, RefPtr<CSSVariableData>>> getVariables()
       const;
 
   const CSSValue* getFontSizeCSSValuePreferringKeyword() const;
   bool isMonospaceFont() const;
 
   MutableStylePropertySet* copyPropertiesInSet(
       const Vector<CSSPropertyID>&) const;
 
+  // CSSOM functions.
+  unsigned length() const override;
+  String item(unsigned index) const override;
+
   DECLARE_VIRTUAL_TRACE();
 
  private:
   CSSComputedStyleDeclaration(Node*, bool allowVisitedStyle, const String&);
 
   // The styled node is either the node passed into getComputedStyle, or the
   // PseudoElement for :before and :after if they exist.
   // FIXME: This should be styledElement since in JS getComputedStyle only works
   // on Elements, but right now editing creates these for text nodes. We should
   // fix that.
   Node* styledNode() const;
 
-  // CSSOM functions. Don't make these public.
+  // CSSOM functions.
   CSSRule* parentRule() const override;
-  unsigned length() const override;
-  String item(unsigned index) const override;
   const ComputedStyle* computeComputedStyle() const;
   String getPropertyValue(const String& propertyName) override;
   String getPropertyPriority(const String& propertyName) override;
   String getPropertyShorthand(const String& propertyName) override;
   bool isPropertyImplicit(const String& propertyName) override;
   void setProperty(const String& propertyName,
                    const String& value,
                    const String& priority,
                    ExceptionState&) override;
   String removeProperty(const String& propertyName, ExceptionState&) override;
@@ skipping 14 matching lines @@
   bool cssPropertyMatches(CSSPropertyID, const CSSValue*) const override;
 
   Member<Node> m_node;
   PseudoId m_pseudoElementSpecifier;
   bool m_allowVisitedStyle;
 };
 
 }  // namespace blink
 
 #endif  // CSSComputedStyleDeclaration_h