Adding @domName annotations to impl files what were missing them.

sdk/lib/html/templates/html/impl/impl_DocumentFragment.darttemplate

 // Copyright (c) 2011, 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.
 
 part of html;
 
 Future<CSSStyleDeclaration> _emptyStyleFuture() {
   return _createMeasurementFuture(() => new Element.tag('div').style,
                                   new Completer<CSSStyleDeclaration>());
 }
 
 class _FrozenCssClassSet extends CssClassSet {
   void writeClasses(Set s) {
     throw new UnsupportedError(
         'frozen class set cannot be modified');
   }
   Set<String> readClasses() => new Set<String>();
 
   bool get frozen => true;
 }
 
+/// @domName $DOMNAME
 class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   factory $CLASSNAME() => _$(CLASSNAME)FactoryProvider.createDocumentFragment();
 
   factory $CLASSNAME.html(String html) =>
       _$(CLASSNAME)FactoryProvider.createDocumentFragment_html(html);
 
   factory $CLASSNAME.svg(String svgContent) =>
       _$(CLASSNAME)FactoryProvider.createDocumentFragment_svg(svgContent);
 
   List<Element> get elements => this.children;
@@ skipping 225 matching lines @@
       "WebKit drop zone can't be set for document fragments.");
   }
 
   void set webkitRegionOverflow(String value) {
     throw new UnsupportedError(
       "WebKit region overflow can't be set for document fragments.");
   }
 
 $!MEMBERS
 }