Pass rootNode by reference when constructing node lists / collections

Source/core/dom/NameNodeList.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, 2007 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 13 matching lines @@
 #include "core/dom/NameNodeList.h"
 
 #include "core/dom/Element.h"
 #include "core/dom/NodeRareData.h"
 #include "wtf/Assertions.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
-NameNodeList::NameNodeList(PassRefPtr<ContainerNode> rootNode, const AtomicString& name)
+NameNodeList::NameNodeList(ContainerNode& rootNode, const AtomicString& name)
     : LiveNodeList(rootNode, NameNodeListType, InvalidateOnNameAttrChange)
     , m_name(name)
 {
 }
 
 NameNodeList::~NameNodeList()
 {
     ownerNode().nodeLists()->removeCache(this, NameNodeListType, m_name);
 }
 
 bool NameNodeList::nodeMatches(const Element& testNode) const
 {
     return testNode.getNameAttribute() == m_name;
 }
 
 } // namespace WebCore