CSSValue Immediates: Replace CSSPrimitiveValue usage with const references

Source/core/css/FontFace.cpp

Index: Source/core/css/FontFace.cpp
diff --git a/Source/core/css/FontFace.cpp b/Source/core/css/FontFace.cpp
index 7404133588ae3aeb73671b8dacb5db59e07750bd..bd6f9ccc312f59ed9218937df0722479603de567 100644
--- a/Source/core/css/FontFace.cpp
+++ b/Source/core/css/FontFace.cpp
@@ -242,7 +242,7 @@ bool FontFace::setPropertyFromStyle(const StylePropertySet& properties, CSSPrope
     return setPropertyValue(properties.getPropertyCSSValue(propertyID), propertyID);
 }
 
-bool FontFace::setPropertyValue(NullableCSSValue value, CSSPropertyID propertyID)
+bool FontFace::setPropertyValue(const NullableCSSValue& value, CSSPropertyID propertyID)
 {
     switch (propertyID) {
     case CSSPropertyFontStyle:
@@ -278,7 +278,7 @@ bool FontFace::setFamilyValue(CSSValueList* familyList)
     if (familyList->length() != 1)
         return false;
 
-    CSSPrimitiveValue familyValue = toCSSPrimitiveValue(familyList->item(0));
+    const CSSPrimitiveValue& familyValue = toCSSPrimitiveValue(familyList->item(0));
     AtomicString family;
     if (familyValue.isCustomIdent()) {
         family = AtomicString(familyValue.getStringValue());
@@ -511,7 +511,7 @@ static PassOwnPtrWillBeRawPtr<CSSFontFace> createCSSFontFace(FontFace* fontFace,
     return adoptPtrWillBeNoop(new CSSFontFace(fontFace, ranges));
 }
 
-void FontFace::initCSSFontFace(Document* document, CSSValue src)
+void FontFace::initCSSFontFace(Document* document, const CSSValue& src)
 {
     m_cssFontFace = createCSSFontFace(this, m_unicodeRange);
     if (m_error)