CSSValue Immediates: Replace CSSValue usage with const references

Source/core/css/CSSValueList.cpp

Index: Source/core/css/CSSValueList.cpp
diff --git a/Source/core/css/CSSValueList.cpp b/Source/core/css/CSSValueList.cpp
index cd59514bf950642a323a3d95c17e912aba433dd6..9ff9d8741b0f3a92ffe5554e204cc99bfed087f5 100644
--- a/Source/core/css/CSSValueList.cpp
+++ b/Source/core/css/CSSValueList.cpp
@@ -38,7 +38,7 @@ CSSValueList::CSSValueList(ValueListSeparator listSeparator)
     m_valueListSeparator = listSeparator;
 }
 
-bool CSSValueList::removeAll(CSSValue val)
+bool CSSValueList::removeAll(const CSSValue& val)
 {
     bool found = false;
     for (int index = m_values.size() - 1; index >= 0; --index) {
@@ -52,7 +52,7 @@ bool CSSValueList::removeAll(CSSValue val)
     return found;
 }
 
-bool CSSValueList::hasValue(CSSValue val) const
+bool CSSValueList::hasValue(const CSSValue& val) const
 {
     for (size_t index = 0; index < m_values.size(); index++) {
         const CSSValue& value = m_values.at(index);