Move rendering/RenderBox to layout/LayoutBox.

Source/core/layout/LayerStackingNode.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 122 matching lines @@
     void setStackingParent(LayerStackingNode* stackingParent) { m_stackingParent = stackingParent; }
 #endif
 
     bool shouldBeNormalFlowOnly() const;
 
     void updateNormalFlowList();
 
     bool isDirtyStackingContext() const { return m_zOrderListsDirty && isStackingContext(); }
 
     LayerCompositor* compositor() const;
-    // We can't return a RenderBox as RenderInline can be a stacking context.
+    // We can't return a LayoutBox as RenderInline can be a stacking context.
     LayoutBoxModelObject* renderer() const;
 
     Layer* m_layer;
 
     // m_posZOrderList holds a sorted list of all the descendant nodes within
     // that have z-indices of 0 or greater (auto will count as 0).
     // m_negZOrderList holds descendants within our stacking context with
     // negative z-indices.
     OwnPtr<Vector<LayerStackingNode*>> m_posZOrderList;
     OwnPtr<Vector<LayerStackingNode*>> m_negZOrderList;
@@ skipping 54 matching lines @@
 
 private:
     LayerStackingNode* m_stackingNode;
     bool m_previousMutationAllowedState;
 };
 #endif
 
 } // namespace blink
 
 #endif // LayerStackingNode_h