Use @Native annotation on dart2js DOM native classes

tools/dom/templates/html/impl/impl_IDBFactory.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.
 
 part of $LIBRARYNAME;
 
-$(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+$(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
   /**
    * Checks to see if Indexed DB is supported on the current platform.
    */
   static bool get supported {
 $if DARTIUM
     return true;
 $else
     return JS('bool',
         '!!(window.indexedDB || '
         'window.webkitIndexedDB || '
@@ skipping 85 matching lines @@
 Future _completeRequest(Request request) {
   var completer = new Completer.sync();
   // TODO: make sure that completer.complete is synchronous as transactions
   // may be committed if the result is not processed immediately.
   request.onSuccess.listen((e) {
     completer.complete(request.result);
   });
   request.onError.listen(completer.completeError);
   return completer.future;
 }