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

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 3677 matching lines @@
     exceptionState.throwDOMException(
         HierarchyRequestError,
         String::format("Only one %s on document allowed.",
                        numElements > 1 ? "element" : "doctype"));
     return false;
   }
 
   return true;
 }
 
-Node* Document::cloneNode(bool deep) {
+Node* Document::cloneNode(bool deep, ExceptionState&) {
   Document* clone = cloneDocumentWithoutChildren();
   clone->cloneDataFromDocument(*this);
   if (deep)
     cloneChildNodes(clone);
   return clone;
 }
 
 Document* Document::cloneDocumentWithoutChildren() {
   DocumentInit init(url());
   if (isXMLDocument()) {
@@ skipping 2871 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (blink::Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->url().getString().utf8().data());
 }
 #endif