Animation: Fix loss of type information when interpolating value of 0

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 58 matching lines @@
     DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(CSSCalcExpressionNode);
 public:
     enum Type {
         CssCalcPrimitiveValue = 1,
         CssCalcBinaryOperation
     };
 
     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 accumulateLengthArray(CSSLengthArray&, CSSLengthTypeArray&, 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 type() const = 0;
 
     CalculationCategory category() const { return m_category; }
     virtual CSSPrimitiveValue::UnitType primitiveType() const = 0;
     bool isInteger() const { return m_isInteger; }
 
     virtual void trace(Visitor*) { }
@@ skipping 24 matching lines @@
         PixelsAndPercent value(0, 0);
         m_expression->accumulatePixelsAndPercent(conversionData, value);
         return CalculationValue::create(value, m_nonNegative ? ValueRangeNonNegative : ValueRangeAll);
     }
     CalculationCategory category() const { return m_expression->category(); }
     bool isInt() const { return m_expression->isInteger(); }
     double doubleValue() const;
     bool isNegative() const { return m_expression->doubleValue() < 0; }
     ValueRange permittedValueRange() { return m_nonNegative ? ValueRangeNonNegative : ValueRangeAll; }
     double computeLengthPx(const CSSToLengthConversionData&) const;
-    void accumulateLengthArray(CSSLengthArray& lengthArray, double multiplier) const { m_expression->accumulateLengthArray(lengthArray, multiplier); }
+    void accumulateLengthArray(CSSLengthArray& lengthArray, CSSLengthTypeArray& lengthTypeArray, double multiplier) const { m_expression->accumulateLengthArray(lengthArray, lengthTypeArray, multiplier); }
     CSSCalcExpressionNode* expressionNode() const { return m_expression.get(); }
 
     String customCSSText() const;
     bool equals(const CSSCalcValue&) const;
 
     void traceAfterDispatch(Visitor*);
 
 private:
     CSSCalcValue(PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> expression, ValueRange range)
         : CSSValue(CalculationClass)
         , m_expression(expression)
         , m_nonNegative(range == ValueRangeNonNegative)
     {
     }
 
     double clampToPermittedRange(double) const;
 
     const RefPtrWillBeMember<CSSCalcExpressionNode> m_expression;
     const bool m_nonNegative;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCalcValue, isCalcValue());
 
 } // namespace blink
 
 
 #endif // CSSCalculationValue_h