Move Image ownership out of CSSValue

Source/core/css/CSSCursorImageValue.h

 /*
  * Copyright (C) 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All right reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 28 matching lines @@
 
     ~CSSCursorImageValue();
 
     bool hotSpotSpecified() const { return m_hotSpotSpecified; }
 
     IntPoint hotSpot() const { return m_hotSpot; }
 
     String customCSSText() const;
 
     bool updateIfSVGCursorIsUsed(Element*);
-    StyleImage* cachedImage(Document*, float deviceScaleFactor);
-    StyleImage* cachedOrPendingImage(float deviceScaleFactor);
+    StyleImage* cachedImage(Document*, CSSStyleImageMap&, float deviceScaleFactor);
+    StyleImage* cachedOrPendingImage(CSSStyleImageMap&, float deviceScaleFactor);
 
 #if !ENABLE(OILPAN)
     void removeReferencedElement(SVGElement*);
 #endif
 
     bool equals(const CSSCursorImageValue&) const;
 
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private:
@@ skipping 13 matching lines @@
 #if !ENABLE(OILPAN)
     HashSet<SVGElement*> m_referencedElements;
 #endif
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCursorImageValue, isCursorImageValue());
 
 } // namespace blink
 
 #endif // CSSCursorImageValue_h