Use new Traversal<HTML*Element> API in HTML code

Source/core/html/HTMLObjectElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 127 matching lines @@
 }
 
 // FIXME: This function should not deal with url or serviceType!
 void HTMLObjectElement::parametersForPlugin(Vector<String>& paramNames, Vector<String>& paramValues, String& url, String& serviceType)
 {
     HashSet<StringImpl*, CaseFoldingHash> uniqueParamNames;
     String urlParameter;
 
     // Scan the PARAM children and store their name/value pairs.
     // Get the URL and type from the params if we don't already have them.
-    for (Element* child = ElementTraversal::firstWithin(*this); child; child = ElementTraversal::nextSibling(*child)) {
-        if (!child->hasTagName(paramTag))
-            continue;
-
-        HTMLParamElement* p = toHTMLParamElement(child);
+    for (HTMLParamElement* p = Traversal<HTMLParamElement>::firstChild(*this); p; p = Traversal<HTMLParamElement>::nextSibling(*p)) {
         String name = p->name();
         if (name.isEmpty())
             continue;
 
         uniqueParamNames.add(name.impl());
         paramNames.append(p->name());
         paramValues.append(p->value());
 
         // FIXME: url adjustment does not belong in this function.
         if (url.isEmpty() && urlParameter.isEmpty() && (equalIgnoringCase(name, "src") || equalIgnoringCase(name, "movie") || equalIgnoringCase(name, "code") || equalIgnoringCase(name, "url")))
@@ skipping 314 matching lines @@
 {
     return fastHasAttribute(usemapAttr);
 }
 
 bool HTMLObjectElement::useFallbackContent() const
 {
     return HTMLPlugInElement::useFallbackContent() || m_useFallbackContent;
 }
 
 }