Made all const methods on CSSPrimitiveValue have the const keyword

Source/core/css/CSSPrimitiveValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  *
  * 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.
  *
@@ skipping 236 matching lines @@
         return adoptRefWillBeNoop(quirkValue);
     }
 
     ~CSSPrimitiveValue();
 
     void cleanup();
 
     UnitType typeWithCalcResolved() const;
 
     double computeDegrees() const;
-    double computeSeconds();
+    double computeSeconds() const;
 
     // Computes a length in pixels, resolving relative lengths
-    template<typename T> T computeLength(const CSSToLengthConversionData&);
+    template<typename T> T computeLength(const CSSToLengthConversionData&) const;
 
     // Converts to a Length (Fixed, Percent or Calculated)
-    Length convertToLength(const CSSToLengthConversionData&);
+    Length convertToLength(const CSSToLengthConversionData&) const;
 
     double getDoubleValue() const;
     float getFloatValue() const { return getValue<float>(); }
     int getIntValue() const { return getValue<int>(); }
     template<typename T> inline T getValue() const { return clampTo<T>(getDoubleValue()); }
 
     String getStringValue() const;
 
     Rect* getRectValue() const { ASSERT(isRect()); return m_value.rect; }
     Quad* getQuadValue() const { ASSERT(isQuad()); return m_value.quad; }
     RGBA32 getRGBA32Value() const { ASSERT(isRGBColor()); return m_value.rgbcolor; }
 
     // TODO(timloh): Add isPair() and update callers so we can ASSERT(isPair())
     Pair* getPairValue() const { return type() != UnitType::Pair ? 0 : m_value.pair; }
 
     CSSBasicShape* getShapeValue() const { ASSERT(isShape()); return m_value.shape; }
     CSSCalcValue* cssCalcValue() const { ASSERT(isCalculated()); return m_value.calc; }
     CSSPropertyID getPropertyID() const { ASSERT(isPropertyID()); return m_value.propertyID; }
 
     CSSValueID getValueID() const { return type() == UnitType::ValueID ? m_value.valueID : CSSValueInvalid; }
 
     template<typename T> inline operator T() const; // Defined in CSSPrimitiveValueMappings.h
 
     static const char* unitTypeToString(UnitType);
     String customCSSText() const;
 
-    bool isQuirkValue() { return m_isQuirkValue; }
+    bool isQuirkValue() const { return m_isQuirkValue; }
 
     bool equals(const CSSPrimitiveValue&) const;
 
     DECLARE_TRACE_AFTER_DISPATCH();
 
     static UnitType canonicalUnitTypeForCategory(UnitCategory);
     static double conversionToCanonicalUnitsScaleFactor(UnitType);
 
     // Returns true and populates lengthUnitType, if unitType is a length unit. Otherwise, returns false.
     static bool unitTypeToLengthUnitType(UnitType, LengthUnitType&);
@@ skipping 27 matching lines @@
 
     void init(UnitType);
     void init(const Length&);
     void init(const LengthSize&, const ComputedStyle&);
     void init(PassRefPtrWillBeRawPtr<Rect>);
     void init(PassRefPtrWillBeRawPtr<Pair>);
     void init(PassRefPtrWillBeRawPtr<Quad>);
     void init(PassRefPtrWillBeRawPtr<CSSBasicShape>);
     void init(PassRefPtrWillBeRawPtr<CSSCalcValue>);
 
-    double computeLengthDouble(const CSSToLengthConversionData&);
+    double computeLengthDouble(const CSSToLengthConversionData&) const;
 
     inline UnitType type() const { return static_cast<UnitType>(m_primitiveUnitType); }
 
     union {
         CSSPropertyID propertyID;
         CSSValueID valueID;
         double num;
         StringImpl* string;
         RGBA32 rgbcolor;
         // FIXME: oilpan: Should be members, but no support for members in unions. Just trace the raw ptr for now.
         CSSBasicShape* shape;
         CSSCalcValue* calc;
         Pair* pair;
         Rect* rect;
         Quad* quad;
     } m_value;
 };
 
 typedef CSSPrimitiveValue::CSSLengthArray CSSLengthArray;
 typedef CSSPrimitiveValue::CSSLengthTypeArray CSSLengthTypeArray;
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSPrimitiveValue, isPrimitiveValue());
 
 } // namespace blink
 
 #endif // CSSPrimitiveValue_h