Remove SiblingRuleHelper

Source/core/dom/shadow/ShadowRoot.h

Index: Source/core/dom/shadow/ShadowRoot.h
diff --git a/Source/core/dom/shadow/ShadowRoot.h b/Source/core/dom/shadow/ShadowRoot.h
index d11e9ae55cf8081f176a2152c98ed1ad66864aaa..78230f2b69b500c73794027dfa2927946ed6a513 100644
--- a/Source/core/dom/shadow/ShadowRoot.h
+++ b/Source/core/dom/shadow/ShadowRoot.h
@@ -124,24 +124,6 @@ public:
     StyleSheetList* styleSheets();
     bool isActiveForStyling() const;
 
-    bool childrenSupportStyleSharing() const;
-    bool childrenAffectedByPositionalRules() const;
-    bool childrenAffectedByFirstChildRules() const;
-    bool childrenAffectedByLastChildRules() const;
-    bool childrenAffectedByDirectAdjacentRules() const;
-    bool childrenAffectedByIndirectAdjacentRules() const;
-    bool childrenAffectedByForwardPositionalRules() const;
-    bool childrenAffectedByBackwardPositionalRules() const;
-
-    void setChildrenAffectedByFirstChildRules();
-    void setChildrenAffectedByLastChildRules();
-    void setChildrenAffectedByDirectAdjacentRules();
-    void setChildrenAffectedByIndirectAdjacentRules();
-    void setChildrenAffectedByForwardPositionalRules();
-    void setChildrenAffectedByBackwardPositionalRules();
-
-    using Node::isFinishedParsingChildren; // make public for SelectorChecker
-
 private:
     ShadowRoot(Document&, ShadowRootType);
     virtual ~ShadowRoot();