CSSValue Immediates: Change CSSValue to an object instead of a pointer

Source/core/css/parser/CSSParser.cpp

Index: Source/core/css/parser/CSSParser.cpp
diff --git a/Source/core/css/parser/CSSParser.cpp b/Source/core/css/parser/CSSParser.cpp
index 88cefa6f0b33bf2cd13a04e9755072e36f695c5a..4a4c095d07b031aa4258522bb1dda9c2aac0a4f5 100644
--- a/Source/core/css/parser/CSSParser.cpp
+++ b/Source/core/css/parser/CSSParser.cpp
@@ -52,9 +52,9 @@ bool CSSParser::parseValue(MutableStylePropertySet* declaration, CSSPropertyID u
     if (string.isEmpty())
         return false;
     CSSPropertyID resolvedProperty = resolveCSSPropertyID(unresolvedProperty);
-    RefPtrWillBeRawPtr<CSSValue> value = CSSParserFastPaths::maybeParseValue(resolvedProperty, string, parserMode);
+    NullableCSSValue value = CSSParserFastPaths::maybeParseValue(resolvedProperty, string, parserMode);
     if (value)
-        return declaration->setProperty(CSSProperty(resolvedProperty, value.release(), important));
+        return declaration->setProperty(CSSProperty(resolvedProperty, *value, important));
     CSSParserContext context(parserMode, 0);
     if (styleSheet) {
         context = styleSheet->parserContext();
@@ -68,11 +68,11 @@ bool CSSParser::parseValue(MutableStylePropertySet* declaration, CSSPropertyID u
     return CSSParserImpl::parseValue(declaration, unresolvedProperty, string, important, context);
 }
 
-PassRefPtrWillBeRawPtr<CSSValue> CSSParser::parseSingleValue(CSSPropertyID propertyID, const String& string, const CSSParserContext& context)
+NullableCSSValue CSSParser::parseSingleValue(CSSPropertyID propertyID, const String& string, const CSSParserContext& context)
 {
     if (string.isEmpty())
         return nullptr;
-    if (RefPtrWillBeRawPtr<CSSValue> value = CSSParserFastPaths::maybeParseValue(propertyID, string, context.mode()))
+    if (NullableCSSValue value = CSSParserFastPaths::maybeParseValue(propertyID, string, context.mode()))
         return value;
     RefPtrWillBeRawPtr<MutableStylePropertySet> stylePropertySet = MutableStylePropertySet::create();
     bool changed = parseValue(stylePropertySet.get(), propertyID, string, false, context);
@@ -119,11 +119,11 @@ bool CSSParser::parseColor(RGBA32& color, const String& string, bool strict)
     if (!parseValue(stylePropertySet.get(), CSSPropertyColor, string, false, strictCSSParserContext()))
         return false;
 
-    RefPtrWillBeRawPtr<CSSValue> value = stylePropertySet->getPropertyCSSValue(CSSPropertyColor);
+    NullableCSSValue value = stylePropertySet->getPropertyCSSValue(CSSPropertyColor);
     if (!value || !value->isPrimitiveValue())
         return false;
 
-    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value.get());
+    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
     if (!primitiveValue->isRGBColor())
         return false;
 
@@ -154,7 +154,7 @@ bool CSSParser::parseSystemColor(RGBA32& color, const String& colorString)
     return true;
 }
 
-PassRefPtrWillBeRawPtr<CSSValue> CSSParser::parseFontFaceDescriptor(CSSPropertyID propertyID, const String& propertyValue, const CSSParserContext& context)
+NullableCSSValue CSSParser::parseFontFaceDescriptor(CSSPropertyID propertyID, const String& propertyValue, const CSSParserContext& context)
 {
     StringBuilder builder;
     builder.appendLiteral("@font-face { ");