Use @Native annotation on dart2js DOM native classes

tools/dom/templates/html/impl/impl_IDBTransaction.darttemplate

 // Copyright (c) 2013, 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 {
 
   /**
    * Provides a Future which will be completed once the transaction has
    * completed.
    *
    * The future will error if an error occurrs on the transaction or if the
    * transaction is aborted.
    */
   Future<Database> get completed {
     var completer = new Completer<Database>();
@@ skipping 11 matching lines @@
       if (!completer.isCompleted) {
         completer.completeError(e);
       }
     });
 
     return completer.future;
   }
 
 $!MEMBERS
 }