CSSValue Immediates: Make CSSPrimitiveValue a container

Source/core/css/CSSValuePool.h

Index: Source/core/css/CSSValuePool.h
diff --git a/Source/core/css/CSSValuePool.h b/Source/core/css/CSSValuePool.h
index c6c4317a62cfdf10a52790ef4d1e6e84dd75bec4..44325a13287ea3b0b32fd1d6bd0bb6a511de91cc 100644
--- a/Source/core/css/CSSValuePool.h
+++ b/Source/core/css/CSSValuePool.h
@@ -44,19 +44,19 @@ class CORE_EXPORT CSSValuePool :  public NoBaseWillBeGarbageCollectedFinalized<C
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(CSSValuePool);
 public:
     PassRefPtrWillBeRawPtr<CSSValueList> createFontFaceValue(const AtomicString&);
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createFontFamilyValue(const String&);
+    CSSPrimitiveValue createFontFamilyValue(const String&);
     PassRefPtrWillBeRawPtr<CSSInheritedValue> createInheritedValue() { return m_inheritedValue; }
     PassRefPtrWillBeRawPtr<CSSInitialValue> createImplicitInitialValue() { return m_implicitInitialValue; }
     PassRefPtrWillBeRawPtr<CSSInitialValue> createExplicitInitialValue() { return m_explicitInitialValue; }
     PassRefPtrWillBeRawPtr<CSSUnsetValue> createUnsetValue() { return m_unsetValue; }
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createIdentifierValue(CSSValueID identifier);
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createIdentifierValue(CSSPropertyID identifier);
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createColorValue(unsigned rgbValue);
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(double value, CSSPrimitiveValue::UnitType);
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(const String& value, CSSPrimitiveValue::UnitType type) { return CSSPrimitiveValue::create(value, type); }
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(const Length& value, const ComputedStyle&);
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(const Length& value, float zoom) { return CSSPrimitiveValue::create(value, zoom); }
-    template<typename T> static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createValue(T value) { return CSSPrimitiveValue::create(value); }
+    CSSPrimitiveValue createIdentifierValue(CSSValueID identifier);
+    CSSPrimitiveValue createIdentifierValue(CSSPropertyID identifier);
+    CSSPrimitiveValue createColorValue(unsigned rgbValue);
+    CSSPrimitiveValue createValue(double value, CSSPrimitiveValue::UnitType);
+    CSSPrimitiveValue createValue(const String& value, CSSPrimitiveValue::UnitType type) { return CSSPrimitiveValue::create(value, type); }
+    CSSPrimitiveValue createValue(const Length& value, const ComputedStyle&);
+    CSSPrimitiveValue createValue(const Length& value, float zoom) { return CSSPrimitiveValue::create(value, zoom); }
+    template<typename T> static CSSPrimitiveValue createValue(T value) { return CSSPrimitiveValue::create(value); }
 
     DECLARE_TRACE();
 
@@ -68,24 +68,24 @@ private:
     RefPtrWillBeMember<CSSInitialValue> m_explicitInitialValue;
     RefPtrWillBeMember<CSSUnsetValue> m_unsetValue;
 
-    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue>, numCSSValueKeywords> m_identifierValueCache;
+    WillBeHeapVector<NullableCSSValue, numCSSValueKeywords> m_identifierValueCache;
 
-    typedef WillBeHeapHashMap<unsigned, RefPtrWillBeMember<CSSPrimitiveValue>> ColorValueCache;
+    typedef WillBeHeapHashMap<unsigned, NullableCSSValue> ColorValueCache;
     ColorValueCache m_colorValueCache;
-    RefPtrWillBeMember<CSSPrimitiveValue> m_colorTransparent;
-    RefPtrWillBeMember<CSSPrimitiveValue> m_colorWhite;
-    RefPtrWillBeMember<CSSPrimitiveValue> m_colorBlack;
+    CSSValue m_colorTransparent;
+    CSSValue m_colorWhite;
+    CSSValue m_colorBlack;
 
     static const int maximumCacheableIntegerValue = 255;
 
-    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1> m_pixelValueCache;
-    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1> m_percentValueCache;
-    WillBeHeapVector<RefPtrWillBeMember<CSSPrimitiveValue>, maximumCacheableIntegerValue + 1> m_numberValueCache;
+    WillBeHeapVector<NullableCSSValue, maximumCacheableIntegerValue + 1> m_pixelValueCache;
+    WillBeHeapVector<NullableCSSValue, maximumCacheableIntegerValue + 1> m_percentValueCache;
+    WillBeHeapVector<NullableCSSValue, maximumCacheableIntegerValue + 1> m_numberValueCache;
 
     typedef WillBeHeapHashMap<AtomicString, RefPtrWillBeMember<CSSValueList>> FontFaceValueCache;
     FontFaceValueCache m_fontFaceValueCache;
 
-    typedef WillBeHeapHashMap<String, RefPtrWillBeMember<CSSPrimitiveValue>> FontFamilyValueCache;
+    typedef WillBeHeapHashMap<String, NullableCSSValue> FontFamilyValueCache;
     FontFamilyValueCache m_fontFamilyValueCache;
 
     friend CORE_EXPORT CSSValuePool& cssValuePool();