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

Source/core/css/RuleFeature.cpp

Index: Source/core/css/RuleFeature.cpp
diff --git a/Source/core/css/RuleFeature.cpp b/Source/core/css/RuleFeature.cpp
index a43cb3edadf21afed83eed2ba0d4f765cfb923cd..25087c5dac9b421c40f0168186eca47ab5b95bde 100644
--- a/Source/core/css/RuleFeature.cpp
+++ b/Source/core/css/RuleFeature.cpp
@@ -305,18 +305,18 @@ void RuleFeatureSet::updateInvalidationSetsForContentAttribute(const RuleData& r
         return;
 
     StylePropertySet::PropertyReference contentProperty = propertySet.propertyAt(propertyIndex);
-    CSSValue* contentValue = contentProperty.value();
+    CSSValue contentValue = contentProperty.value();
 
-    if (!contentValue->isValueList())
+    if (!contentValue.isValueList())
         return;
 
-    for (auto& item : toCSSValueList(*contentValue)) {
-        if (!item->isPrimitiveValue())
+    for (auto& item : toCSSValueList(contentValue)) {
+        if (!item.isPrimitiveValue())
             continue;
-        CSSPrimitiveValue* primitiveItem = toCSSPrimitiveValue(item.get());
-        if (!primitiveItem->isAttr())
+        CSSPrimitiveValue& primitiveItem = toCSSPrimitiveValue(item);
+        if (!primitiveItem.isAttr())
             continue;
-        ensureAttributeInvalidationSet(AtomicString(primitiveItem->getStringValue()));
+        ensureAttributeInvalidationSet(AtomicString(primitiveItem.getStringValue()));
     }
 }