Changed Pair to be a CSSValue

Source/core/css/CSSValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 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,
@@ skipping 41 matching lines @@
     void deref()
     {
         if (derefBase())
             destroy();
     }
 #endif // !ENABLE(OILPAN)
 
     String cssText() const;
 
     bool isPrimitiveValue() const { return m_classType == PrimitiveClass; }
+    bool isValuePair() const { return m_classType == ValuePairClass; }
     bool isValueList() const { return m_classType >= ValueListClass; }
 
     bool isBaseValueList() const { return m_classType == ValueListClass; }
 
     bool isBorderImageSliceValue() const { return m_classType == BorderImageSliceClass; }
     bool isCanvasValue() const { return m_classType == CanvasClass; }
     bool isCounterValue() const { return m_classType == CounterClass; }
     bool isCursorImageValue() const { return m_classType == CursorImageClass; }
     bool isCrossfadeValue() const { return m_classType == CrossfadeClass; }
     bool isFontFeatureValue() const { return m_classType == FontFeatureClass; }
@@ skipping 37 matching lines @@
     // 'source\wtf\refcounted.h' by using msvc.
     ~CSSValue() { }
 
 protected:
 
     static const size_t ClassTypeBits = 6;
     enum ClassType {
         PrimitiveClass,
         CounterClass,
         QuadClass,
+        ValuePairClass,
 
         // Image classes.
         ImageClass,
         CursorImageClass,
 
         // Image generator classes.
         CanvasClass,
         CrossfadeClass,
         LinearGradientClass,
         RadialGradientClass,
@@ skipping 116 matching lines @@
         return false;
     return first->equals(*second);
 }
 
 #define DEFINE_CSS_VALUE_TYPE_CASTS(thisType, predicate) \
     DEFINE_TYPE_CASTS(thisType, CSSValue, value, value->predicate, value.predicate)
 
 } // namespace blink
 
 #endif // CSSValue_h