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

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

 /*
  * 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)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc.
  * All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
@@ skipping 231 matching lines @@
                EVisibility::kVisible;
   }
 
   // FIXME: Even if we are not visible, we might have a child that is visible.
   // Hyatt wants to fix that some day with a "has visible content" flag or the
   // like.
   return layoutObject() &&
          layoutObject()->style()->visibility() == EVisibility::kVisible;
 }
 
-Node* Element::cloneNode(bool deep) {
+Node* Element::cloneNode(bool deep, ExceptionState&) {
   return deep ? cloneElementWithChildren() : cloneElementWithoutChildren();
 }
 
 Element* Element::cloneElementWithChildren() {
   Element* clone = cloneElementWithoutChildren();
   cloneChildNodes(clone);
   return clone;
 }
 
 Element* Element::cloneElementWithoutChildren() {
@@ skipping 3871 matching lines @@
 }
 
 DEFINE_TRACE_WRAPPERS(Element) {
   if (hasRareData()) {
     visitor->traceWrappers(elementRareData());
   }
   ContainerNode::traceWrappers(visitor);
 }
 
 }  // namespace blink