Use @Native annotation on dart2js DOM native classes

tools/dom/templates/html/impl/impl_IDBCursor.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 {
   @DomName('IDBCursor.delete')
   Future delete() {
    try {
       return _completeRequest(_delete());
     } catch (e, stacktrace) {
       return new Future.error(e, stacktrace);
     }
   }
 
   @DomName('IDBCursor.value')
@@ skipping 11 matching lines @@
   void next([Object key]) {
     if (key == null) {
       JS('void', '#.continue()', this);
     } else {
       JS('void', '#.continue(#)', this, key);
     }
   }
   $endif
   $!MEMBERS
 }