Oilpan: Remove guardRef and guardDeref from TreeScope.

Source/core/html/HTMLFormControlElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * 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 45 matching lines @@
     , m_isValid(true)
     , m_wasChangedSinceLastFormControlChangeEvent(false)
     , m_wasFocusedByMouse(false)
 {
     setHasCustomStyleCallbacks();
     associateByParser(form);
 }
 
 HTMLFormControlElement::~HTMLFormControlElement()
 {
+#if !ENABLE(OILPAN)
     setForm(0);
+#endif
 }
 
 String HTMLFormControlElement::formEnctype() const
 {
     const AtomicString& formEnctypeAttr = fastGetAttribute(formenctypeAttr);
     if (formEnctypeAttr.isNull())
         return emptyString();
     return FormSubmission::Attributes::parseEncodingType(formEnctypeAttr);
 }
 
@@ skipping 417 matching lines @@
 
 void HTMLFormControlElement::setFocus(bool flag)
 {
     LabelableElement::setFocus(flag);
 
     if (!flag && wasChangedSinceLastFormControlChangeEvent())
         dispatchFormControlChangeEvent();
 }
 
 } // namespace Webcore