Oilpan: Prepare to move FormAssociatedElement to Oilpan heap, part 1.

Source/core/html/FormAssociatedElement.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 40 matching lines @@
 FormAssociatedElement::FormAssociatedElement()
     : m_formWasSetByParser(false)
 {
 }
 
 FormAssociatedElement::~FormAssociatedElement()
 {
     // We can't call setForm here because it contains virtual calls.
 }
 
+void FormAssociatedElement::trace(Visitor* visitor)
+{
+    visitor->trace(m_form);
+    visitor->trace(m_validityState);
+}
+
 ValidityState* FormAssociatedElement::validity()
 {
     if (!m_validityState)
         m_validityState = ValidityState::create(this);
 
     return m_validityState.get();
 }
 
 void FormAssociatedElement::didMoveToNewDocument(Document& oldDocument)
 {
@@ skipping 64 matching lines @@
 }
 
 void FormAssociatedElement::setForm(HTMLFormElement* newForm)
 {
     if (m_form.get() == newForm)
         return;
     willChangeForm();
     if (m_form)
         m_form->disassociate(*this);
     if (newForm) {
+#if ENABLE(OILPAN)
+        m_form = newForm;
+#else
         m_form = newForm->createWeakPtr();
+#endif
         m_form->associate(*this);
     } else {
+#if ENABLE(OILPAN)
+        m_form = nullptr;
+#else
         m_form = WeakPtr<HTMLFormElement>();
+#endif
     }
     didChangeForm();
 }
 
 void FormAssociatedElement::willChangeForm()
 {
 }
 
 void FormAssociatedElement::didChangeForm()
 {
@@ skipping 161 matching lines @@
     , m_element(element)
 {
 }
 
 void FormAttributeTargetObserver::idTargetChanged()
 {
     m_element->formAttributeTargetChanged();
 }
 
 } // namespace Webcore