Move CSSCalcExpressionNode and subclasses to the oilpan heap.

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 38 matching lines @@
 
 enum CalculationCategory {
     CalcNumber = 0,
     CalcLength,
     CalcPercent,
     CalcPercentNumber,
     CalcPercentLength,
     CalcOther
 };
 
-class CSSCalcExpressionNode : public RefCounted<CSSCalcExpressionNode> {
+class CSSCalcExpressionNode : public RefCountedWillBeGarbageCollected<CSSCalcExpressionNode> {
+    DECLARE_GC_INFO;
 public:
     enum Type {
         CssCalcPrimitiveValue = 1,
         CssCalcBinaryOperation
     };
 
     virtual ~CSSCalcExpressionNode() = 0;
     virtual bool isZero() const = 0;
     virtual PassOwnPtr<CalcExpressionNode> toCalcValue(const CSSToLengthConversionData&) const = 0;
     virtual double doubleValue() const = 0;
     virtual double computeLengthPx(const CSSToLengthConversionData&) 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::UnitTypes primitiveType() const = 0;
     bool isInteger() const { return m_isInteger; }
 
+    virtual void trace(Visitor*) { }
+
 protected:
     CSSCalcExpressionNode(CalculationCategory category, bool isInteger)
         : m_category(category)
         , m_isInteger(isInteger)
     {
     }
 
     CalculationCategory m_category;
     bool m_isInteger;
 };
 
 class CSSCalcValue : public CSSValue {
 public:
     static PassRefPtrWillBeRawPtr<CSSCalcValue> create(CSSParserString name, CSSParserValueList*, ValueRange);
-    static PassRefPtrWillBeRawPtr<CSSCalcValue> create(PassRefPtr<CSSCalcExpressionNode>, ValueRange = ValueRangeAll);
+    static PassRefPtrWillBeRawPtr<CSSCalcValue> create(PassRefPtrWillBeRawPtr<CSSCalcExpressionNode>, ValueRange = ValueRangeAll);
     static PassRefPtrWillBeRawPtr<CSSCalcValue> create(const CalculationValue* value, float zoom) { return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSCalcValue(value, zoom)); }
 
-    static PassRefPtr<CSSCalcExpressionNode> createExpressionNode(PassRefPtr<CSSPrimitiveValue>, bool isInteger = false);
-    static PassRefPtr<CSSCalcExpressionNode> createExpressionNode(PassRefPtr<CSSCalcExpressionNode>, PassRefPtr<CSSCalcExpressionNode>, CalcOperator);
-    static PassRefPtr<CSSCalcExpressionNode> createExpressionNode(const CalcExpressionNode*, float zoom);
-    static PassRefPtr<CSSCalcExpressionNode> createExpressionNode(const Length&, float zoom);
+    static PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> createExpressionNode(PassRefPtrWillBeRawPtr<CSSPrimitiveValue>, bool isInteger = false);
+    static PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> createExpressionNode(PassRefPtrWillBeRawPtr<CSSCalcExpressionNode>, PassRefPtrWillBeRawPtr<CSSCalcExpressionNode>, CalcOperator);
+    static PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> createExpressionNode(const CalcExpressionNode*, float zoom);
+    static PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> createExpressionNode(const Length&, float zoom);
 
     PassRefPtr<CalculationValue> toCalcValue(const CSSToLengthConversionData& conversionData) const
     {
         return CalculationValue::create(m_expression->toCalcValue(conversionData), 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;
     CSSCalcExpressionNode* expressionNode() const { return m_expression.get(); }
 
     String customCSSText() const;
     bool equals(const CSSCalcValue&) const;
 
-    void traceAfterDispatch(Visitor* visitor) { CSSValue::traceAfterDispatch(visitor); }
+    void traceAfterDispatch(Visitor*);
 
 private:
-    CSSCalcValue(PassRefPtr<CSSCalcExpressionNode> expression, ValueRange range)
+    CSSCalcValue(PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> expression, ValueRange range)
         : CSSValue(CalculationClass)
         , m_expression(expression)
         , m_nonNegative(range == ValueRangeNonNegative)
     {
     }
     CSSCalcValue(const CalculationValue* value, float zoom)
         : CSSValue(CalculationClass)
         , m_expression(createExpressionNode(value->expression(), zoom))
         , m_nonNegative(value->isNonNegative())
     {
     }
 
     double clampToPermittedRange(double) const;
 
-    const RefPtr<CSSCalcExpressionNode> m_expression;
+    const RefPtrWillBeMember<CSSCalcExpressionNode> m_expression;
     const bool m_nonNegative;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCalcValue, isCalcValue());
 
 } // namespace WebCore
 
 
 #endif // CSSCalculationValue_h