[oilpan] Make the oilpan branch build on Mac.

Source/core/dom/NodeRenderingContext.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, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 45 matching lines @@
 
 NodeRenderingContext::NodeRenderingContext(Node* node)
     : m_node(node)
     , m_parentFlowRenderer(0)
 {
     m_renderingParent = NodeRenderingTraversal::parent(node, &m_parentDetails);
 }
 
 NodeRenderingContext::NodeRenderingContext(Node* node, RenderStyle* style)
     : m_node(node)
-    , m_renderingParent(0)
     , m_style(style)
     , m_parentFlowRenderer(0)
 {
 }
 
 NodeRenderingContext::~NodeRenderingContext()
 {
 }
 
 static bool isRendererReparented(const RenderObject* renderer)
@@ skipping 229 matching lines @@
     newRenderer->setFlowThreadState(parentRenderer->flowThreadState());
 
     RenderObject* nextRenderer = this->nextRenderer();
     textNode->setRenderer(newRenderer);
     // Parent takes care of the animations, no need to call setAnimatableStyle.
     newRenderer->setStyle(m_style.release());
     parentRenderer->addChild(newRenderer, nextRenderer);
 }
 
 }