Port the SVG code to the wrapperless DOM.

client/dom/templates/html/interface/interface_DocumentFragment.darttemplate

 // 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.
 
 interface DocumentFragment extends Element default _$(ID)FactoryProvider {
 
   DocumentFragment();
 
   DocumentFragment.html(String html);
 
-  // TODO(nweiz): enable these when XML and/or SVG are ported
+  // TODO(nweiz): enable this when XML is ported
   // /** WARNING: Currently this doesn't work on Dartium (issue 649). */
   // DocumentFragment.xml(String xml);
-  // DocumentFragment.svg(String svg);
+
+  DocumentFragment.svg(String svg);
 
   DocumentFragment clone(bool deep);
 
 $!MEMBERS
 }