Remove some unused state from RenderLayerStackingNode

Source/core/rendering/RenderLayerStackingNode.h

Index: Source/core/rendering/RenderLayerStackingNode.h
diff --git a/Source/core/rendering/RenderLayerStackingNode.h b/Source/core/rendering/RenderLayerStackingNode.h
index 4ea9162499a34c22c12db81aa12e40734c0e0173..f808161f37c260c9099a244a14dcaeed9fe6114e 100644
--- a/Source/core/rendering/RenderLayerStackingNode.h
+++ b/Source/core/rendering/RenderLayerStackingNode.h
@@ -85,9 +85,6 @@ public:
     bool normalFlowListDirty() const { return m_normalFlowListDirty; }
     void dirtyNormalFlowList();
 
-    enum PaintOrderListType {BeforePromote, AfterPromote};
-    void computePaintOrderList(PaintOrderListType, Vector<RefPtr<Node> >&);

[abarth-chromium, 2014/06/01 22:03:53]

This function also has no callers and no implementation.

-
     void updateStackingNodesAfterStyleChange(const RenderStyle* oldStyle);
 
     RenderLayerStackingNode* ancestorStackingContextNode() const;
@@ -163,12 +160,6 @@ private:
     // overflow layers, but that may change in the future.
     OwnPtr<Vector<RenderLayerStackingNode*> > m_normalFlowList;
 
-    // If this is true, then no non-descendant appears between any of our
-    // descendants in stacking order. This is one of the requirements of being
-    // able to safely become a stacking context.
-    unsigned m_descendantsAreContiguousInStackingOrder : 1;
-    unsigned m_descendantsAreContiguousInStackingOrderDirty : 1;
-
     unsigned m_zOrderListsDirty : 1;
     unsigned m_normalFlowListDirty: 1;
     unsigned m_isNormalFlowOnly : 1;