Make sure the rootNode of a LiveNodeListBase is always a ContainerNode

Source/core/html/HTMLFormControlsCollection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2010, 2011, 2012 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 17 matching lines @@
 #include "core/html/HTMLFormElement.h"
 #include "core/html/HTMLImageElement.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 // Since the collections are to be "live", we have to do the
 // calculation every time if anything has changed.
 
-HTMLFormControlsCollection::HTMLFormControlsCollection(Node* ownerNode)
+HTMLFormControlsCollection::HTMLFormControlsCollection(ContainerNode* ownerNode)
     : HTMLCollection(ownerNode, FormControls, OverridesItemAfter)
     , m_cachedElement(0)
     , m_cachedElementOffsetInArray(0)
 {
     ASSERT(ownerNode->hasTagName(formTag) || ownerNode->hasTagName(fieldsetTag));
     ScriptWrappable::init(this);
 }
 
-PassRefPtr<HTMLFormControlsCollection> HTMLFormControlsCollection::create(Node* ownerNode, CollectionType)
+PassRefPtr<HTMLFormControlsCollection> HTMLFormControlsCollection::create(ContainerNode* ownerNode, CollectionType)
 {
     return adoptRef(new HTMLFormControlsCollection(ownerNode));
 }
 
 HTMLFormControlsCollection::~HTMLFormControlsCollection()
 {
 }
 
 const Vector<FormAssociatedElement*>& HTMLFormControlsCollection::formControlElements() const
 {
@@ skipping 141 matching lines @@
         returnValue1Enabled = true;
         returnValue1 = namedItems.at(0);
         return;
     }
 
     returnValue0Enabled = true;
     returnValue0 = this->ownerNode()->radioNodeList(name);
 }
 
 }