Port DocumentFragment to the new wrapperless DOM.

client/html/html_dartium.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // DO NOT EDIT
 // Auto-generated dart:html library.
 
 #library("html");
 
 #import('dart:dom', prefix:'dom');
@@ skipping 1110 matching lines @@
 _wrap(raw) {
   if (raw is! dom.DOMType) return raw;
   dom.DOMType domObject = raw;
   if (domObject.dartObjectLocalStorage != null)
     return domObject.dartObjectLocalStorage;
   switch(domObject.typeName) {
     case 'HTMLDocument':
       throw 'A document should never be wrapped directly. TODO(jacobr) XXX';
     case 'HTMLHtmlElement':
       return new _DocumentImpl._wrap(domObject);
+    case 'HTMLElement':
+      return new _UnknownElementImpl._wrap(domObject);
     case "EventTarget": return new _EventTargetImpl._wrap(domObject);
     case "AbstractWorker": return new _AbstractWorkerImpl._wrap(domObject);
     case "Node": return new _NodeImpl._wrap(domObject);
     case "NodeSelector": return new _NodeSelectorImpl._wrap(domObject);
     case "ElementTraversal": return new _ElementTraversalImpl._wrap(domObject);
     case "Element": return new _ElementImpl._wrap(domObject);
     case "HTMLAnchorElement": return new _AnchorElementImpl._wrap(domObject);
     case "WebKitAnimation": return new _AnimationImpl._wrap(domObject);
     case "Event": return new _EventImpl._wrap(domObject);
     case "WebKitAnimationEvent": return new _AnimationEventImpl._wrap(domObject);
@@ skipping 484 matching lines @@
     case "XPathEvaluator": return new _XPathEvaluatorImpl._wrap(domObject);
     case "XPathException": return new _XPathExceptionImpl._wrap(domObject);
     case "XPathExpression": return new _XPathExpressionImpl._wrap(domObject);
     case "XPathNSResolver": return new _XPathNSResolverImpl._wrap(domObject);
     case "XPathResult": return new _XPathResultImpl._wrap(domObject);
     case "XSLTProcessor": return new _XSLTProcessorImpl._wrap(domObject);
     default:
       throw 'Unrecognized object $domObject. Name=${domObject.typeName}';
   }
 }