Rendering API cleanup

Source/core/rendering/RenderLayerStackingNode.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 71 matching lines @@
     // FIXME: should check for dirtiness here?
     bool isNormalFlowOnly() const { return m_isNormalFlowOnly; }
     void updateIsNormalFlowOnly();
     bool normalFlowListDirty() const { return m_normalFlowListDirty; }
     void dirtyNormalFlowList();
 
     void updateStackingNodesAfterStyleChange(const RenderStyle* oldStyle);
 
     RenderLayerStackingNode* ancestorStackingContextNode() const;
 
-    // Gets the enclosing stacking context for this node, possibly the node
-    // itself, if it is a stacking context.
-    RenderLayerStackingNode* enclosingStackingContextNode() { return isStackingContext() ? this : ancestorStackingContextNode(); }
-
     RenderLayer* layer() const { return m_layer; }
 
 #if ENABLE(ASSERT)
     bool layerListMutationAllowed() const { return m_layerListMutationAllowed; }
     void setLayerListMutationAllowed(bool flag) { m_layerListMutationAllowed = flag; }
 #endif
 
 private:
     friend class RenderLayerStackingNodeIterator;
     friend class RenderLayerStackingNodeReverseIterator;
@@ skipping 105 matching lines @@
 
 private:
     RenderLayerStackingNode* m_stackingNode;
     bool m_previousMutationAllowedState;
 };
 #endif
 
 } // namespace blink
 
 #endif // RenderLayerStackingNode_h