Have ContainerNodeAlgorithms deal with references instead of pointers

Source/core/xml/XMLErrors.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 111 matching lines @@
         RefPtr<Element> rootElement = m_document->createElement(htmlTag, true);
         RefPtr<Element> body = m_document->createElement(bodyTag, true);
         rootElement->parserAppendChild(body);
         m_document->parserAppendChild(rootElement);
         documentElement = body.get();
     } else if (documentElement->namespaceURI() == SVGNames::svgNamespaceURI) {
         RefPtr<Element> rootElement = m_document->createElement(htmlTag, true);
         RefPtr<Element> body = m_document->createElement(bodyTag, true);
         rootElement->parserAppendChild(body);
 
-        m_document->parserRemoveChild(documentElement.get());
+        m_document->parserRemoveChild(*documentElement);
 
         body->parserAppendChild(documentElement);
         m_document->parserAppendChild(rootElement);
 
         documentElement = body.get();
     }
 
     String errorMessages = m_errorMessages.toString();
     RefPtr<Element> reportElement = createXHTMLParserErrorHeader(m_document, errorMessages);
 
@@ skipping 10 matching lines @@
     if (firstChild)
         documentElement->parserInsertBefore(reportElement, documentElement->firstChild());
     else
         documentElement->parserAppendChild(reportElement);
 
     // FIXME: Why do we need to call this manually?
     m_document->updateStyleIfNeeded();
 }
 
 } // namespace WebCore