Add explicit destructors to DOM classes containing smart pointers to incomplete types

Source/core/svg/SVGScriptElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 29 matching lines @@
     static PassRefPtrWillBeRawPtr<SVGScriptElement> create(Document&, bool wasInsertedByParser);
 
     ScriptLoader* loader() const { return m_loader.get(); }
 
 #if ENABLE(ASSERT)
     virtual bool isAnimatableAttribute(const QualifiedName&) const OVERRIDE;
 #endif
 
 private:
     SVGScriptElement(Document&, bool wasInsertedByParser, bool alreadyStarted);
+    virtual ~SVGScriptElement();
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void didNotifySubtreeInsertionsToDocument() OVERRIDE;
     virtual void childrenChanged(const ChildrenChange&) OVERRIDE;
 
     virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
     virtual bool isStructurallyExternal() const OVERRIDE { return hasSourceAttribute(); }
@@ skipping 19 matching lines @@
     virtual Timer<SVGElement>* svgLoadEventTimer() OVERRIDE { return &m_svgLoadEventTimer; }
 
 
     Timer<SVGElement> m_svgLoadEventTimer;
     OwnPtr<ScriptLoader> m_loader;
 };
 
 } // namespace blink
 
 #endif