Oilpan: Unship Oilpan from CSSValues

Source/core/css/CSSProperty.h

Index: Source/core/css/CSSProperty.h
diff --git a/Source/core/css/CSSProperty.h b/Source/core/css/CSSProperty.h
index 6baf18638ff30f8e7bc98c53f854190689bfa04c..43642a04a175adb3bb21dc5a5c654dc0b5a29dae 100644
--- a/Source/core/css/CSSProperty.h
+++ b/Source/core/css/CSSProperty.h
@@ -58,7 +58,7 @@ struct StylePropertyMetadata {
 class CSSProperty {
     ALLOW_ONLY_INLINE_ALLOCATION();
 public:
-    CSSProperty(CSSPropertyID propertyID, PassRefPtrWillBeRawPtr<CSSValue> value, bool important = false, bool isSetFromShorthand = false, int indexInShorthandsVector = 0, bool implicit = false)
+    CSSProperty(CSSPropertyID propertyID, PassRefPtr<CSSValue> value, bool important = false, bool isSetFromShorthand = false, int indexInShorthandsVector = 0, bool implicit = false)
         : m_metadata(propertyID, isSetFromShorthand, indexInShorthandsVector, important, implicit, CSSPropertyMetadata::isInheritedProperty(propertyID))
         , m_value(value)
     {
@@ -85,11 +85,9 @@ public:
 
     bool operator==(const CSSProperty& other) const;
 
-    DEFINE_INLINE_TRACE() { visitor->trace(m_value); }
-
 private:
     StylePropertyMetadata m_metadata;
-    RefPtrWillBeMember<CSSValue> m_value;
+    RefPtr<CSSValue> m_value;
 };
 
 } // namespace blink