Fix getChildElements.

sky/engine/core/dom/ContainerNode.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 857 matching lines @@
 {
     Vector<RefPtr<Node>> result;
     for (Node* node = firstChild(); node; node = node->nextSibling())
         result.append(node);
     return result;
 }
 
 Vector<RefPtr<Element>> ContainerNode::getChildElements() const
 {
     Vector<RefPtr<Element>> result;
-    for (Element* element = ElementTraversal::firstWithin(*this); element; element = ElementTraversal::next(*element, this))
+    for (Element* element = ElementTraversal::firstChild(*this); element; element = ElementTraversal::nextSibling(*element))
         result.append(element);
     return result;
 }
 
 void ContainerNode::append(Vector<RefPtr<Node>>& nodes, ExceptionState& es)
 {
     RefPtr<ContainerNode> protect(this);
     for (auto& node : nodes) {
         appendChild(node.release(), es);
         if (es.had_exception())
@@ skipping 109 matching lines @@
         return true;
 
     if (node->isElementNode() && toElement(node)->shadow())
         return true;
 
     return false;
 }
 #endif
 
 } // namespace blink