Remove needsShadowTreeWalker flag

Source/core/dom/ElementRareData.h

 /*
  * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith <catfish.man@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 28 matching lines @@
 class HTMLElement;
 
 class ElementRareData : public NodeRareData {
 public:
     static PassOwnPtr<ElementRareData> create(RenderObject* renderer) { return adoptPtr(new ElementRareData(renderer)); }
 
     ~ElementRareData();
 
     void setPseudoElement(PseudoId, PassRefPtr<PseudoElement>);
     PseudoElement* pseudoElement(PseudoId) const;
-    bool hasPseudoElements() const { return m_generatedBefore || m_generatedAfter; }
 
     void resetComputedStyle();
     void resetDynamicRestyleObservations();
     
     short tabIndex() const { return m_tabIndex; }
     void setTabIndexExplicitly(short index) { m_tabIndex = index; m_tabIndexWasSetExplicitly = true; }
     bool tabIndexSetExplicitly() const { return m_tabIndexWasSetExplicitly; }
     void clearTabIndexExplicitly() { m_tabIndex = 0; m_tabIndexWasSetExplicitly = false; }
 
     bool needsFocusAppearanceUpdateSoonAfterAttach() const { return m_needsFocusAppearanceUpdateSoonAfterAttach; }
@@ skipping 216 matching lines @@
     setChildrenAffectedByFirstChildRules(false);
     setChildrenAffectedByLastChildRules(false);
     setChildrenAffectedByDirectAdjacentRules(false);
     setChildrenAffectedByForwardPositionalRules(false);
     setChildrenAffectedByBackwardPositionalRules(false);
 }
 
 } // namespace
 
 #endif // ElementRareData_h