Change handling of accepting socket connections

tests/standalone/src/SocketManyConnectionsTest.dart

 // Copyright (c) 2011, 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.
 //
 // Test creating a large number of socket connections.
 
 #source("TestingServer.dart");
 
 final CONNECTIONS = 200;
 
@@ skipping 47 matching lines @@
 
   int _port;
   ReceivePort _receivePort;
   SendPort _sendPort;
   List<Socket> _sockets;
   int _connections;
 }
 
 class TestServer extends TestingServer {
 
-  void connectionHandler() {
+  void connectionHandler(Socket connection) {
     Socket _client;
 
     void closeHandler() {
-      _client.close();
+      connection.close();
     }
 
     void errorHandler() {
       print("Socket error");
-      _client.close();
+      connection.close();
     }
 
-    _client = _server.accept();
     _connections++;
-    _client.closeHandler = closeHandler;
-    _client.errorHandler = errorHandler;
+    connection.closeHandler = closeHandler;
+    connection.errorHandler = errorHandler;
   }
 
   int _connections = 0;
 }
 
 main() {
   SocketManyConnectionsTest test = new SocketManyConnectionsTest.start();
 }