Remove AsyncError with Expando.

sdk/lib/io/secure_server_socket.dart

 // 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 dart.io;
 
 /**
  * The [SecureServerSocket] is a server socket, providing a stream of high-level
  * [Socket]s.
  *
@@ skipping 46 matching lines @@
         address,
         port,
         backlog,
         certificateName,
         requestClientCertificate: requestClientCertificate,
         requireClientCertificate: requireClientCertificate).then(
             (serverSocket) => new SecureServerSocket._(serverSocket));
   }
 
   StreamSubscription<SecureSocket> listen(void onData(SecureSocket socket),
-                                          {void onError(AsyncError error),
+                                          {void onError(error),
                                            void onDone(),
                                            bool unsubscribeOnError}) {
     return _socket.map((rawSocket) => new SecureSocket._(rawSocket))
                   .listen(onData,
                           onError: onError,
                           onDone: onDone,
                           unsubscribeOnError: unsubscribeOnError);
   }
 
   /**
@@ skipping 72 matching lines @@
        bool requireClientCertificate: false}) {
     return RawServerSocket.bind(address, port, backlog)
         .then((serverSocket) => new RawSecureServerSocket._(
             serverSocket,
             certificateName,
             requestClientCertificate,
             requireClientCertificate));
   }
 
   StreamSubscription<RawSecureSocket> listen(void onData(RawSecureSocket s),
-                                             {void onError(AsyncError error),
+                                             {void onError(error),
                                               void onDone(),
                                               bool unsubscribeOnError}) {
     return _controller.stream.listen(onData,
                                      onError: onError,
                                      onDone: onDone,
                                      unsubscribeOnError: unsubscribeOnError);
   }
 
   /**
    * Returns the port used by this socket.
@@ skipping 55 matching lines @@
       _subscription = _socket.listen(_onData,
                                      onDone: _onDone,
                                      onError: _onError);
     } else {
       close();
     }
   }
 }