CSSValue Immediates: Replace CSSPrimitiveValue usage with const references

Source/core/css/CSSComputedStyleDeclaration.cpp

Index: Source/core/css/CSSComputedStyleDeclaration.cpp
diff --git a/Source/core/css/CSSComputedStyleDeclaration.cpp b/Source/core/css/CSSComputedStyleDeclaration.cpp
index 81b316d8cb5f1ec0b206e6b560085ee5370cd711..f5f69b6fddaca1a0e0613b3973b5344bb92131da 100644
--- a/Source/core/css/CSSComputedStyleDeclaration.cpp
+++ b/Source/core/css/CSSComputedStyleDeclaration.cpp
@@ -573,7 +573,7 @@ NullableCSSValue CSSComputedStyleDeclaration::getPropertyCSSValue(CSSPropertyID
 
     NullableCSSValue value = ComputedStyleCSSValueMapping::get(propertyID, *style, layoutObject, styledNode, m_allowVisitedStyle);
     if (value)
-        return *value;
+        return value;
 
     logUnimplementedPropertyID(propertyID);
     return nullptr;
@@ -603,14 +603,14 @@ String CSSComputedStyleDeclaration::item(unsigned i) const
     return getPropertyNameString(computableProperties()[i]);
 }
 
-bool CSSComputedStyleDeclaration::cssPropertyMatches(CSSPropertyID propertyID, const CSSValue propertyValue) const
+bool CSSComputedStyleDeclaration::cssPropertyMatches(CSSPropertyID propertyID, const CSSValue& propertyValue) const
 {
     if (propertyID == CSSPropertyFontSize && propertyValue.isPrimitiveValue() && m_node) {
         m_node->document().updateLayoutIgnorePendingStylesheets();
         const ComputedStyle* style = m_node->ensureComputedStyle(m_pseudoElementSpecifier);
         if (style && style->fontDescription().keywordSize()) {
             CSSValueID sizeValue = cssIdentifierForFontSizeKeyword(style->fontDescription().keywordSize());
-            const CSSPrimitiveValue primitiveValue = toCSSPrimitiveValue(propertyValue);
+            const CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(propertyValue);
             if (primitiveValue.isValueID() && primitiveValue.getValueID() == sizeValue)
                 return true;
         }