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

third_party/WebKit/Source/core/html/HTMLTemplateElement.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 36 matching lines @@
 
 DocumentFragment* HTMLTemplateElement::content() const {
   if (!m_content)
     m_content = TemplateContentDocumentFragment::create(
         document().ensureTemplateDocument(),
         const_cast<HTMLTemplateElement*>(this));
 
   return m_content.get();
 }
 
-Node* HTMLTemplateElement::cloneNode(bool deep) {
+Node* HTMLTemplateElement::cloneNode(bool deep, ExceptionState&) {
   if (!deep)
     return cloneElementWithoutChildren();
 
   Node* clone = cloneElementWithChildren();
   if (m_content)
     content()->cloneChildNodes(toHTMLTemplateElement(clone)->content());
   return clone;
 }
 
 void HTMLTemplateElement::didMoveToNewDocument(Document& oldDocument) {
   HTMLElement::didMoveToNewDocument(oldDocument);
   if (!m_content)
     return;
   document().ensureTemplateDocument().adoptIfNeeded(*m_content);
 }
 
 DEFINE_TRACE(HTMLTemplateElement) {
   visitor->trace(m_content);
   HTMLElement::trace(visitor);
 }
 
 DEFINE_TRACE_WRAPPERS(HTMLTemplateElement) {
   visitor->traceWrappers(m_content);
   HTMLElement::traceWrappers(visitor);
 }
 
 }  // namespace blink