Remove needsShadowTreeWalker flag

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 Apple Inc. All rights reserved.
  *
  * 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
@@ skipping 476 matching lines @@
     LayoutSize minimumSizeForResizing() const;
     void setMinimumSizeForResizing(const LayoutSize&);
 
     virtual void didBecomeFullscreenElement() { }
     virtual void willStopBeingFullscreenElement() { }
 
     bool isFinishedParsingChildren() const { return isParsingChildrenFinished(); }
     virtual void finishParsingChildren();
     virtual void beginParsingChildren() OVERRIDE FINAL;
 
-    bool hasPseudoElements() const;
     PseudoElement* pseudoElement(PseudoId) const;
     RenderObject* pseudoElementRenderer(PseudoId) const;
-    bool childNeedsShadowWalker() const;
-    void didShadowTreeAwareChildrenChange();
 
     virtual bool matchesReadOnlyPseudoClass() const;
     virtual bool matchesReadWritePseudoClass() const;
     bool webkitMatchesSelector(const String& selectors, ExceptionCode&);
     virtual bool shouldAppearIndeterminate() const;
 
     DOMTokenList* classList();
 
     DOMStringMap* dataset();
 
@@ skipping 116 matching lines @@
     HTMLCollection* cachedHTMLCollection(CollectionType);
 
     // classAttributeChanged() exists to share code between
     // parseAttribute (called via setAttribute()) and
     // svgAttributeChanged (called when element.className.baseValue is set)
     void classAttributeChanged(const AtomicString& newClassString);
 
 private:
     void updatePseudoElement(PseudoId, StyleChange);
     void createPseudoElementIfNeeded(PseudoId);
-    void setPseudoElement(PseudoId, PassRefPtr<PseudoElement>);
 
     virtual bool areAuthorShadowsAllowed() const { return true; }
     virtual void didAddUserAgentShadowRoot(ShadowRoot*) { }
     virtual bool alwaysCreateUserAgentShadowRoot() const { return false; }
 
     // FIXME: Remove the need for Attr to call willModifyAttribute/didModifyAttribute.
     friend class Attr;
 
     enum SynchronizationOfLazyAttribute { NotInSynchronizationOfLazyAttribute = 0, InSynchronizationOfLazyAttribute };
 
@@ skipping 348 matching lines @@
 
 inline const Attribute* ElementData::attributeItem(unsigned index) const
 {
     RELEASE_ASSERT(index < length());
     return attributeBase() + index;
 }
 
 } // namespace
 
 #endif