CSSValue Immediates: Change CSSValue to an object instead of a pointer

Source/core/css/CSSCrossfadeValue.h

Index: Source/core/css/CSSCrossfadeValue.h
diff --git a/Source/core/css/CSSCrossfadeValue.h b/Source/core/css/CSSCrossfadeValue.h
index cb71539951a6e806d26624905c460f7c3196400b..7d581ea976af58a089587b6bd926bda746502497 100644
--- a/Source/core/css/CSSCrossfadeValue.h
+++ b/Source/core/css/CSSCrossfadeValue.h
@@ -42,7 +42,7 @@ class LayoutObject;
 class CSSCrossfadeValue final : public CSSImageGeneratorValue {
     friend class CrossfadeSubimageObserverProxy;
 public:
-    static PassRefPtrWillBeRawPtr<CSSCrossfadeValue> create(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue)
+    static PassRefPtrWillBeRawPtr<CSSCrossfadeValue> create(CSSValue fromValue, CSSValue toValue)
     {
         return adoptRefWillBeNoop(new CSSCrossfadeValue(fromValue, toValue));
     }
@@ -74,7 +74,7 @@ public:
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private:
-    CSSCrossfadeValue(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue)
+    CSSCrossfadeValue(CSSValue fromValue, CSSValue toValue)
         : CSSImageGeneratorValue(CrossfadeClass)
         , m_fromValue(fromValue)
         , m_toValue(toValue)
@@ -98,8 +98,8 @@ private:
 
     void crossfadeChanged(const IntRect&);
 
-    RefPtrWillBeMember<CSSValue> m_fromValue;
-    RefPtrWillBeMember<CSSValue> m_toValue;
+    CSSValue m_fromValue;
+    CSSValue m_toValue;
     RefPtrWillBeMember<CSSPrimitiveValue> m_percentageValue;
 
     ResourcePtr<ImageResource> m_cachedFromImage;