Oilpan: move ScriptLoader to the heap.

Source/core/html/HTMLScriptElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * 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 28 matching lines @@
     String text() { return textFromChildren(); }
     void setText(const String&);
 
     KURL src() const;
 
     void setAsync(bool);
     bool async() const;
 
     ScriptLoader* loader() const { return m_loader.get(); }
 
+    virtual void trace(Visitor*) override;
+
 private:
     HTMLScriptElement(Document&, bool wasInsertedByParser, bool alreadyStarted);
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
     virtual void attributeWillChange(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue) override;
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
     virtual void didNotifySubtreeInsertionsToDocument() override;
     virtual void childrenChanged(const ChildrenChange&) override;
     virtual void didMoveToNewDocument(Document& oldDocument) override;
 
     virtual bool isURLAttribute(const Attribute&) const override;
     virtual bool hasLegalLinkAttribute(const QualifiedName&) const override;
     virtual const QualifiedName& subResourceAttributeName() const override;
 
     virtual String sourceAttributeValue() const override;
     virtual String charsetAttributeValue() const override;
     virtual String typeAttributeValue() const override;
     virtual String languageAttributeValue() const override;
     virtual String forAttributeValue() const override;
     virtual String eventAttributeValue() const override;
     virtual bool asyncAttributeValue() const override;
     virtual bool deferAttributeValue() const override;
     virtual bool hasSourceAttribute() const override;
 
     virtual void dispatchLoadEvent() override;
 
     virtual PassRefPtrWillBeRawPtr<Element> cloneElementWithoutAttributesAndChildren() override;
 
-    OwnPtr<ScriptLoader> m_loader;
+    OwnPtrWillBeMember<ScriptLoader> m_loader;
 };
 
 } // namespace blink
 
 #endif // HTMLScriptElement_h