Oilpan: Unship Oilpan from CSSValues

Source/core/css/CSSImageSetValue.h

Index: Source/core/css/CSSImageSetValue.h
diff --git a/Source/core/css/CSSImageSetValue.h b/Source/core/css/CSSImageSetValue.h
index b50d572dbd847111a10212710589ee256c5de29a..d8e274c3efd0791b3d314b9849ec39935aa2176f 100644
--- a/Source/core/css/CSSImageSetValue.h
+++ b/Source/core/css/CSSImageSetValue.h
@@ -40,9 +40,9 @@ class StyleImage;
 class CSSImageSetValue : public CSSValueList {
 public:
 
-    static PassRefPtrWillBeRawPtr<CSSImageSetValue> create()
+    static PassRefPtr<CSSImageSetValue> create()
     {
-        return adoptRefWillBeNoop(new CSSImageSetValue());
+        return adoptRef(new CSSImageSetValue());
     }
     ~CSSImageSetValue();
 
@@ -65,8 +65,6 @@ public:
 
     bool hasFailedOrCanceledSubresources() const;
 
-    DECLARE_TRACE_AFTER_DISPATCH();
-
 protected:
     ImageWithScale bestImageForScaleFactor();
 
@@ -76,7 +74,7 @@ private:
     void fillImageSet();
     static inline bool compareByScaleFactor(ImageWithScale first, ImageWithScale second) { return first.scaleFactor < second.scaleFactor; }
 
-    RefPtrWillBeMember<StyleImage> m_imageSet;
+    RefPtrWillBePersistent<StyleImage> m_imageSet;
     bool m_accessedBestFitImage;
 
     // This represents the scale factor that we used to find the best fit image. It does not necessarily