CSSValue Immediates: Change CSSValue to an object instead of a pointer

Source/core/css/CSSInitialValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 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 CSSInitialValue_h
 #define CSSInitialValue_h
 
 #include "core/css/CSSValue.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
-class CSSInitialValue : public CSSValue {
+class CSSInitialValue : public CSSValueObject {
 public:
     static PassRefPtrWillBeRawPtr<CSSInitialValue> createExplicit()
     {
         return adoptRefWillBeNoop(new CSSInitialValue(/* implicit */ false));
     }
     static PassRefPtrWillBeRawPtr<CSSInitialValue> createImplicit()
     {
         return adoptRefWillBeNoop(new CSSInitialValue(/* implicit */ true));
     }
 
     String customCSSText() const;
 
     bool isImplicit() const { return m_isImplicit; }
 
     bool equals(const CSSInitialValue&) const { return true; }
 
-    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValue::traceAfterDispatch(visitor); }
+    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValueObject::traceAfterDispatch(visitor); }
 
 private:
     explicit CSSInitialValue(bool implicit)
-        : CSSValue(InitialClass)
+        : CSSValueObject(InitialClass)
         , m_isImplicit(implicit)
     {
     }
 
     bool m_isImplicit;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSInitialValue, isInitialValue());
 
 } // namespace blink
 
 #endif // CSSInitialValue_h