Remove unnecessary override of Node#cloneNode in ShadowRoot's WebIDL

third_party/WebKit/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) 2003-2011, 2013, 2014 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 889 matching lines @@
     return ensureComputedStyle(pseudoElementSpecifier);
   }
 
   inline void updateCallbackSelectors(const ComputedStyle* oldStyle,
                                       const ComputedStyle* newStyle);
   inline void removeCallbackSelectors();
   inline void addCallbackSelectors();
 
   // cloneNode is private so that non-virtual cloneElementWithChildren and
   // cloneElementWithoutChildren are used instead.
-  Node* cloneNode(bool deep) override;
+  Node* cloneNode(bool deep, ExceptionState&) override;
   virtual Element* cloneElementWithoutAttributesAndChildren();
 
   QualifiedName m_tagName;
 
   void updateNamedItemRegistration(const AtomicString& oldName,
                                    const AtomicString& newName);
   void updateExtraNamedItemRegistration(const AtomicString& oldName,
                                         const AtomicString& newName);
 
   void createUniqueElementData();
@@ skipping 270 matching lines @@
 #define DECLARE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
   static T* create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T)                     \
   T* T::create(const QualifiedName& tagName, Document& document) { \
     return new T(tagName, document);                               \
   }
 
 }  // namespace blink
 
 #endif  // Element_h