Remove SiblingRuleHelper

Source/core/dom/SiblingRuleHelper.h

Index: Source/core/dom/SiblingRuleHelper.h
diff --git a/Source/core/dom/SiblingRuleHelper.h b/Source/core/dom/SiblingRuleHelper.h
deleted file mode 100644
index 47436c7fd38952e90cdef1fe3ae873514d3b8dd9..0000000000000000000000000000000000000000
--- a/Source/core/dom/SiblingRuleHelper.h
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright (c) 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef SiblingRuleHelper_h
-#define SiblingRuleHelper_h
-
-#include "core/dom/Node.h"
-
-namespace WebCore {
-
-class SiblingRuleHelper {
-public:
-    SiblingRuleHelper(Node* node) : m_node(node)
-    {
-        ASSERT(node);
-        ASSERT(node->isElementNode() || node->isShadowRoot());
-    }
-
-    void checkForChildrenAdjacentRuleChanges();
-
-    void setChildrenAffectedByDirectAdjacentRules();
-    void setChildrenAffectedByIndirectAdjacentRules();
-    void setChildrenAffectedByForwardPositionalRules();
-    void setChildrenAffectedByBackwardPositionalRules();
-    void setChildrenAffectedByFirstChildRules();
-    void setChildrenAffectedByLastChildRules();
-
-    bool isFinishedParsingChildren();
-
-    bool childrenSupportStyleSharing();
-
-private:
-    bool childrenAffectedByPositionalRules() const;
-    bool childrenAffectedByFirstChildRules() const;
-    bool childrenAffectedByLastChildRules() const;
-    bool childrenAffectedByDirectAdjacentRules() const;
-    bool childrenAffectedByIndirectAdjacentRules() const;
-    bool childrenAffectedByForwardPositionalRules() const;
-    bool childrenAffectedByBackwardPositionalRules() const;
-
-    Node* m_node;
-};
-
-} // namespace
-
-#endif