[WIP] Add support for CSSValue-> CSSLengthValue and CSSTranslation

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 60 matching lines @@
     };
 
     virtual bool isZero() const = 0;
     virtual double doubleValue() const = 0;
     virtual double computeLengthPx(const CSSToLengthConversionData&) const = 0;
     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* getLHS() const = 0;
+    virtual const CSSCalcExpressionNode* getRHS() const = 0;
+    virtual CalcOperator op() 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)
@@ skipping 47 matching lines @@
 
     double clampToPermittedRange(double) const;
 
     const Member<CSSCalcExpressionNode> m_expression;
     const bool m_nonNegative;
 };
 
 } // namespace blink
 
 #endif // CSSCalculationValue_h