Move Image ownership out of CSSValue

Source/core/css/CSSCanvasValue.h

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
         return adoptRefWillBeNoop(new CSSCanvasValue(name));
     }
     ~CSSCanvasValue();
 
     String customCSSText() const;
 
     PassRefPtr<Image> image(LayoutObject*, const IntSize&);
     bool isFixedSize() const { return true; }
     IntSize fixedSize(const LayoutObject*);
 
-    bool isPending() const { return false; }
-    void loadSubimages(Document*) { }
+    bool isPending(CSSStyleImageMap&) const { return false; }
+    void loadSubimages(Document*, CSSStyleImageMap&) { }
 
     bool equals(const CSSCanvasValue&) const;
 
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private:
     explicit CSSCanvasValue(const String& name)
         : CSSImageGeneratorValue(CanvasClass)
         , m_canvasObserver(adoptPtrWillBeNoop(new CanvasObserverProxy(this)))
         , m_name(name)
@@ skipping 47 matching lines @@
     String m_name;
     // The document supplies the element and owns it.
     RawPtrWillBeWeakMember<HTMLCanvasElement> m_element;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCanvasValue, isCanvasValue());
 
 } // namespace blink
 
 #endif // CSSCanvasValue_h