Use patching for dart:io.

lib/io/socket_stream_impl.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.
 
 class _SocketInputStream implements InputStream {
   _SocketInputStream(Socket socket) : _socket = socket {
     if (_socket._closed) _closed = true;
     _socket.onClosed = _onClosed;
   }
 
@@ skipping 59 matching lines @@
     _onError = callback;
   }
 
   void _onClosed() {
     _closed = true;
     if (_clientCloseHandler !== null) {
       _clientCloseHandler();
     }
   }
 
-  void _onSocketError(e) {
+  bool _onSocketError(e) {
     close();
     if (_onError != null) {
       _onError(e);
       return true;
     } else {
       return false;
     }
   }
 
   Socket _socket;
@@ skipping 130 matching lines @@
     }
   }
 
   Socket _socket;
   _BufferList _pendingWrites;
   Function _onNoPendingWrites;
   Function _onClosed;
   bool _closing = false;
   bool _closed = false;
 }