[oilpan] Make the oilpan branch build on Mac.

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 35 matching lines @@
     virtual void idTargetChanged() OVERRIDE;
 
 private:
     FormAttributeTargetObserver(const AtomicString& id, const Handle<FormAssociatedElement>&);
 
     // FIXME(oilpan): back pointer.
     FormAssociatedElement* m_element;
 };
 
 FormAssociatedElement::FormAssociatedElement()
-    : m_form(0)
 {
 }
 
 FormAssociatedElement::~FormAssociatedElement()
 {
     // m_formAttributeTargetObserver is only non-null when the
     // FormAssociatedElement is in the document. If the FormAssociatedElement
     // is in the document it only dies if the TreeScope dies as well. Therefore
     // the FormAttributeTargetObserver cannot and does not have to unregister
     // itself from the registry in the TreeScope.
@@ skipping 239 matching lines @@
     , m_element(element.raw())
 {
 }
 
 void FormAttributeTargetObserver::idTargetChanged()
 {
     m_element->formAttributeTargetChanged();
 }
 
 } // namespace Webcore