CSSValue Immediates: Replace CSSValue usage with const references

Source/core/css/StylePropertySet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 232 matching lines @@
     // Setting the value to an empty string just removes the property in both IE and Gecko.
     // Setting it to null seems to produce less consistent results, but we treat it just the same.
     if (value.isEmpty())
         return removeProperty(resolveCSSPropertyID(unresolvedProperty));
 
     // When replacing an existing property value, this moves the property to the end of the list.
     // Firefox preserves the position, and MSIE moves the property to the beginning.
     return CSSParser::parseValue(this, unresolvedProperty, value, important, cssParserMode(), contextStyleSheet);
 }
 
-void MutableStylePropertySet::setProperty(CSSPropertyID propertyID, CSSValue prpValue, bool important)
+void MutableStylePropertySet::setProperty(CSSPropertyID propertyID, const CSSValue& prpValue, bool important)
 {
     StylePropertyShorthand shorthand = shorthandForProperty(propertyID);
     if (!shorthand.length()) {
         setProperty(CSSProperty(propertyID, prpValue, important));
         return;
     }
 
     removePropertiesInSet(shorthand.properties(), shorthand.length());
 
-    CSSValue value = prpValue;
+    const CSSValue& value = prpValue;
     for (unsigned i = 0; i < shorthand.length(); ++i)
         m_propertyVector.append(CSSProperty(shorthand.properties()[i], value, important));
 }
 
 bool MutableStylePropertySet::setProperty(const CSSProperty& property, CSSProperty* slot)
 {
     if (!removeShorthandProperty(property.id())) {
         CSSProperty* toReplace = slot ? slot : findCSSPropertyWithID(property.id());
         if (toReplace && *toReplace == property)
             return false;
@@ skipping 107 matching lines @@
 }
 
 CSSProperty* MutableStylePropertySet::findCSSPropertyWithID(CSSPropertyID propertyID)
 {
     int foundPropertyIndex = findPropertyIndex(propertyID);
     if (foundPropertyIndex == -1)
         return 0;
     return &m_propertyVector.at(foundPropertyIndex);
 }
 
-bool StylePropertySet::propertyMatches(CSSPropertyID propertyID, const CSSValue propertyValue) const
+bool StylePropertySet::propertyMatches(CSSPropertyID propertyID, const CSSValue& propertyValue) const
 {
     int foundPropertyIndex = findPropertyIndex(propertyID);
     if (foundPropertyIndex == -1)
         return false;
     return propertyAt(foundPropertyIndex).value().equals(propertyValue);
 }
 
 void MutableStylePropertySet::removeEquivalentProperties(const StylePropertySet* style)
 {
     Vector<CSSPropertyID> propertiesToRemove;
@@ skipping 106 matching lines @@
 {
     return adoptRefWillBeNoop(new MutableStylePropertySet(cssParserMode));
 }
 
 PassRefPtrWillBeRawPtr<MutableStylePropertySet> MutableStylePropertySet::create(const CSSProperty* properties, unsigned count)
 {
     return adoptRefWillBeNoop(new MutableStylePropertySet(properties, count));
 }
 
 } // namespace blink