[oilpan] Make the oilpan branch build on Mac.

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2916 matching lines @@
 }
 
 ElementData::ElementData()
     : m_isUnique(true)
     , m_arraySize(0)
     , m_presentationAttributeStyleIsDirty(false)
     , m_styleAttributeIsDirty(false)
 #if ENABLE(SVG)
     , m_animatedSVGAttributesAreDirty(false)
 #endif
-    , m_classNames(0)
 {
     Handle<ElementData> thisHandle(this);
     thisHandle->m_classNames = SpaceSplitString::create();
 }
 
 ElementData::ElementData(unsigned arraySize)
     : m_isUnique(false)
     , m_arraySize(arraySize)
     , m_presentationAttributeStyleIsDirty(false)
     , m_styleAttributeIsDirty(false)
 #if ENABLE(SVG)
     , m_animatedSVGAttributesAreDirty(false)
 #endif
-    , m_classNames(0)
 {
     Handle<ElementData> thisHandle(this);
     thisHandle->m_classNames = SpaceSplitString::create();
 }
 
 struct SameSizeAsElementData : public HeapAllocatedFinalized<SameSizeAsElementData> {
     unsigned bitfield;
     void* members[3];
 };
 
@@ skipping 188 matching lines @@
     return &m_attributeVector.at(index);
 }
 
 void UniqueElementData::acceptHeapVisitor(Visitor* visitor) const
 {
     visitor->visit(m_presentationAttributeStyle);
     ElementData::acceptHeapVisitor(visitor);
 }
 
 } // namespace WebCore