Fix various nits in VM patch files.

sdk/lib/async/deferred_load.dart

 // 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 dart.async;
 
 /**
  * Indicates that loading of [libraryName] is deferred.
  *
  * This class is obsolete. Instead use the syntax:
@@ skipping 12 matching lines @@
    * If the library fails to load, the Future will complete with a
    * DeferredLoadException.
    */
   external Future<Null> load();
 }
 
 /**
  * Thrown when a deferred library fails to load.
  */
 class DeferredLoadException implements Exception {
-  DeferredLoadException(String this._s);
+  DeferredLoadException(this._s);
   String toString() => "DeferredLoadException: '$_s'";
   final String _s;
 }