[CSS Regions] Elements in a region should be assignable to a named flow

Source/core/dom/NodeRenderingContext.h

 /*
  * 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 50 matching lines @@
     InsertionPoint* insertionPoint() const;
 
     const RenderStyle* style() const;
 
     bool isOnUpperEncapsulationBoundary() const;
     bool isOnEncapsulationBoundary() const;
 
 private:
     bool shouldCreateRenderer() const;
     void moveToFlowThreadIfNeeded();
+    bool elementInsideRegionNeedsRenderer();
 
     Node* m_node;
     ContainerNode* m_renderingParent;
     NodeRenderingTraversal::ParentDetails m_parentDetails;
     RefPtr<RenderStyle> m_style;
     RenderNamedFlowThread* m_parentFlowRenderer;
     AtomicString m_flowThread;
 };
 
 inline Node* NodeRenderingContext::node() const
@@ skipping 17 matching lines @@
 }
 
 inline InsertionPoint* NodeRenderingContext::insertionPoint() const
 {
     return m_parentDetails.insertionPoint();
 }
 
 } // namespace WebCore
 
 #endif