Oilpan: Prepare to move ImageLoader and its subclasses to Oilpan heap.

Source/core/html/HTMLImageLoader.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004 Apple Computer, Inc.
  *
  * 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.
  *
@@ skipping 11 matching lines @@
 
 #ifndef HTMLImageLoader_h
 #define HTMLImageLoader_h
 
 #include "core/loader/ImageLoader.h"
 
 namespace WebCore {
 
 class HTMLImageLoader FINAL : public ImageLoader {
 public:
-    HTMLImageLoader(Element*);
+    static PassOwnPtrWillBeRawPtr<HTMLImageLoader> create(Element* element)
+    {
+        return adoptPtrWillBeNoop(new HTMLImageLoader(element));
+    }
     virtual ~HTMLImageLoader();
 
     virtual void dispatchLoadEvent() OVERRIDE;
     virtual String sourceURI(const AtomicString&) const OVERRIDE;
 
     virtual void notifyFinished(Resource*) OVERRIDE;
+
+private:
+    explicit HTMLImageLoader(Element*);
 };
 
 }
 
 #endif