[CSS Typed OM] Implement support for CSSValue -> CSSCalcLength

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

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 64 matching lines @@
   virtual void accumulateLengthArray(CSSLengthArray&,
                                      double multiplier) const = 0;
   virtual void accumulatePixelsAndPercent(const CSSToLengthConversionData&,
                                           PixelsAndPercent&,
                                           float multiplier = 1) const = 0;
   virtual String customCSSText() const = 0;
   virtual bool equals(const CSSCalcExpressionNode& other) const {
     return m_category == other.m_category && m_isInteger == other.m_isInteger;
   }
   virtual Type getType() const = 0;
+  virtual const CSSCalcExpressionNode* leftExpressionNode() const = 0;
+  virtual const CSSCalcExpressionNode* rightExpressionNode() const = 0;
+  virtual CalcOperator operatorType() const = 0;
 
   CalculationCategory category() const { return m_category; }
   virtual CSSPrimitiveValue::UnitType typeWithCalcResolved() const = 0;
   bool isInteger() const { return m_isInteger; }
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 
  protected:
   CSSCalcExpressionNode(CalculationCategory category, bool isInteger)
       : m_category(category), m_isInteger(isInteger) {
@@ skipping 51 matching lines @@
 
   double clampToPermittedRange(double) const;
 
   const Member<CSSCalcExpressionNode> m_expression;
   const bool m_nonNegative;
 };
 
 }  // namespace blink
 
 #endif  // CSSCalculationValue_h