CSSValue Immediates: Replace CSSPrimitiveValue usage with const references

Source/core/css/CSSCursorImageValue.h

Index: Source/core/css/CSSCursorImageValue.h
diff --git a/Source/core/css/CSSCursorImageValue.h b/Source/core/css/CSSCursorImageValue.h
index 19fb15471b7fafeb10c65871c2f36fe7d145db38..cc0685c3ff2108db3596fe7d509562783fcf3956 100644
--- a/Source/core/css/CSSCursorImageValue.h
+++ b/Source/core/css/CSSCursorImageValue.h
@@ -32,7 +32,7 @@ class SVGElement;
 
 class CSSCursorImageValue : public CSSValueObject {
 public:
-    static PassRefPtrWillBeRawPtr<CSSCursorImageValue> create(CSSValue imageValue, bool hotSpotSpecified, const IntPoint& hotSpot)
+    static PassRefPtrWillBeRawPtr<CSSCursorImageValue> create(const CSSValue& imageValue, bool hotSpotSpecified, const IntPoint& hotSpot)
     {
         return adoptRefWillBeNoop(new CSSCursorImageValue(imageValue, hotSpotSpecified, hotSpot));
     }
@@ -58,7 +58,7 @@ public:
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private:
-    CSSCursorImageValue(CSSValue imageValue, bool hotSpotSpecified, const IntPoint& hotSpot);
+    CSSCursorImageValue(const CSSValue& imageValue, bool hotSpotSpecified, const IntPoint& hotSpot);
 
     bool isSVGCursor() const;
     String cachedImageURL();