Add Element::subResourceAttributeName() virtual function

Source/core/html/HTMLObjectElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009 Apple Inc. All rights 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.
  *
@@ skipping 64 matching lines @@
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
 
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
     virtual void didMoveToNewDocument(Document& oldDocument) OVERRIDE;
 
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
 
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
     virtual bool hasLegalLinkAttribute(const QualifiedName&) const OVERRIDE;
+    virtual const QualifiedName* subResourceAttributeName() const OVERRIDE;
     virtual const AtomicString imageSourceURL() const OVERRIDE;
 
     virtual RenderWidget* existingRenderWidget() const OVERRIDE;
 
     virtual void updateWidgetInternal() OVERRIDE;
     void updateDocNamedItem();
 
     void reattachFallbackContent();
 
     bool hasFallbackContent() const;
@@ skipping 39 matching lines @@
     const HTMLObjectElement& objectElement = static_cast<const HTMLObjectElement&>(element);
     // We need to assert after the cast because FormAssociatedElement doesn't
     // have hasTagName.
     ASSERT_WITH_SECURITY_IMPLICATION(objectElement.hasTagName(HTMLNames::objectTag));
     return objectElement;
 }
 
 }
 
 #endif