Change ImmutableStylePropertySet to store const CSSValue

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@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 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,
@@ skipping 139 matching lines @@
     friend class PropertySetCSSStyleDeclaration;
 };
 
 class CORE_EXPORT ImmutableStylePropertySet : public StylePropertySet {
 public:
     ~ImmutableStylePropertySet();
     static ImmutableStylePropertySet* create(const CSSProperty* properties, unsigned count, CSSParserMode);
 
     unsigned propertyCount() const { return m_arraySize; }
 
-    const Member<CSSValue>* valueArray() const;
+    const Member<const CSSValue>* valueArray() const;
     const StylePropertyMetadata* metadataArray() const;
 
     template<typename T> // CSSPropertyID or AtomicString
     int findPropertyIndex(T property) const;
 
     DECLARE_TRACE_AFTER_DISPATCH();
 
     void* operator new(std::size_t, void* location)
     {
         return location;
     }
 
     void* m_storage;
 
 private:
     ImmutableStylePropertySet(const CSSProperty*, unsigned count, CSSParserMode);
 };
 
-inline const Member<CSSValue>* ImmutableStylePropertySet::valueArray() const
+inline const Member<const CSSValue>* ImmutableStylePropertySet::valueArray() const
 {
-    return reinterpret_cast<const Member<CSSValue>*>(const_cast<const void**>(&(this->m_storage)));
+    return reinterpret_cast<const Member<const CSSValue>*>(const_cast<const void**>(&(this->m_storage)));
 }
 
 inline const StylePropertyMetadata* ImmutableStylePropertySet::metadataArray() const
 {
     return reinterpret_cast<const StylePropertyMetadata*>(&reinterpret_cast<const char*>(&(this->m_storage))[m_arraySize * sizeof(Member<CSSValue>)]);
 }
 
 DEFINE_TYPE_CASTS(ImmutableStylePropertySet, StylePropertySet, set, !set->isMutable(), !set.isMutable());
 
 class CORE_EXPORT MutableStylePropertySet : public StylePropertySet {
@@ skipping 94 matching lines @@
 inline int StylePropertySet::findPropertyIndex(T property) const
 {
     if (m_isMutable)
         return toMutableStylePropertySet(this)->findPropertyIndex(property);
     return toImmutableStylePropertySet(this)->findPropertyIndex(property);
 }
 
 } // namespace blink
 
 #endif // StylePropertySet_h