Oilpan: Remove guardRef and guardDeref from TreeScope.

Source/core/html/HTMLObjectElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 40 matching lines @@
 inline HTMLObjectElement::HTMLObjectElement(Document& document, HTMLFormElement* form, bool createdByParser)
     : HTMLPlugInElement(objectTag, document, createdByParser, ShouldNotPreferPlugInsForImages)
     , m_useFallbackContent(false)
 {
     ScriptWrappable::init(this);
     associateByParser(form);
 }
 
 inline HTMLObjectElement::~HTMLObjectElement()
 {
+#if !ENABLE(OILPAN)
     setForm(0);
+#endif
 }
 
 PassRefPtr<HTMLObjectElement> HTMLObjectElement::create(Document& document, HTMLFormElement* form, bool createdByParser)
 {
     RefPtr<HTMLObjectElement> element = adoptRef(new HTMLObjectElement(document, form, createdByParser));
     element->ensureUserAgentShadowRoot();
     return element.release();
 }
 
 RenderWidget* HTMLObjectElement::existingRenderWidget() const
@@ skipping 412 matching lines @@
 {
     return fastHasAttribute(usemapAttr);
 }
 
 bool HTMLObjectElement::useFallbackContent() const
 {
     return HTMLPlugInElement::useFallbackContent() || m_useFallbackContent;
 }
 
 }