StylePropertySerializer should expand all property if needed.

Source/core/css/StylePropertySerializer.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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 StylePropertySerializer_h
 #define StylePropertySerializer_h
 
 #include "core/css/CSSValueList.h"
 #include "core/css/StylePropertySet.h"
 
+#include "wtf/BitArray.h"
+
 namespace blink {
 
 class StylePropertySet;
 class StylePropertyShorthand;
 
 class StylePropertySerializer {
 public:
-    StylePropertySerializer(const StylePropertySet&);
+    explicit StylePropertySerializer(const StylePropertySet&);
+
     String asText() const;
     String getPropertyValue(CSSPropertyID) const;
 private:
     String getCommonValue(const StylePropertyShorthand&) const;
     enum CommonValueMode { OmitUncommonValues, ReturnNullOnUncommonValues };
     String borderPropertyValue(CommonValueMode) const;
     String getLayeredShorthandValue(const StylePropertyShorthand&, bool checkShorthandAvailable = false) const;
     String get4Values(const StylePropertyShorthand&) const;
     String borderSpacingValue(const StylePropertyShorthand&) const;
     String getShorthandValue(const StylePropertyShorthand&) const;
     String fontValue() const;
     void appendFontLonghandValueIfExplicit(CSSPropertyID, StringBuilder& result, String& value) const;
     String backgroundRepeatPropertyValue() const;
     String getPropertyText(CSSPropertyID, const String& value, bool isImportant, bool isNotFirstDecl) const;
     bool isPropertyShorthandAvailable(const StylePropertyShorthand&) const;
     bool shorthandHasOnlyInitialOrInheritedValue(const StylePropertyShorthand&) const;
     void appendBackgroundPropertyAsText(StringBuilder& result, unsigned& numDecls) const;
 
-    const StylePropertySet& m_propertySet;
+    // Only StylePropertySerializer uses the following two classes.
+    class PropertyValueForSerializer {
+    public:
+        explicit PropertyValueForSerializer(StylePropertySet::PropertyReference property)
+            : m_value(property.value())
+            , m_id(property.id())
+            , m_isImportant(property.isImportant())
+            , m_isImplicit(property.isImplicit())
+            , m_isInherited(property.isInherited()) { }
+
+        PropertyValueForSerializer(CSSPropertyID id, const CSSValue* value, bool isImportant)
+            : m_value(value)
+            , m_id(id)
+            , m_isImportant(isImportant)
+            , m_isImplicit(value->isImplicitInitialValue())
+            , m_isInherited(value->isInheritedValue()) { }
+
+        CSSPropertyID id() const { return m_id; }
+        const CSSValue* value() const { return m_value; }
+        bool isImportant() const { return m_isImportant; }
+        bool isImplicit() const { return m_isImplicit; }
+        bool isInherited() const { return m_isInherited; }
+        bool isValid() const { return m_value; }
+
+    private:
+        const CSSValue* m_value;
+        CSSPropertyID m_id;
+        bool m_isImportant;
+        bool m_isImplicit;
+        bool m_isInherited;
+    };
+
+    class StylePropertySetForSerializer {
+    public:
+        explicit StylePropertySetForSerializer(const StylePropertySet&);
+
+        unsigned propertyCount() const;
+        PropertyValueForSerializer propertyAt(unsigned index) const;
+        bool shouldProcessPropertyAt(unsigned index) const;
+        int findPropertyIndex(CSSPropertyID) const;
+        const CSSValue* getPropertyCSSValue(CSSPropertyID) const;
+        String getPropertyValue(CSSPropertyID) const;
+        bool isPropertyImplicit(CSSPropertyID) const;
+        bool propertyIsImportant(CSSPropertyID) const;
+
+    private:
+        bool hasExpandedAllProperty() const { return hasAllProperty() && m_needToExpandAll; }
+        bool hasAllProperty() const { return m_allIndex != -1; }
+
+        const StylePropertySet& m_propertySet;
+        int m_allIndex;
+        BitArray<numCSSProperties> m_longhandPropertyUsed;
+        bool m_needToExpandAll;
+    };
+
+    const StylePropertySetForSerializer m_propertySet;
 };
 
 } // namespace blink
 
 #endif