Change handling of accepting socket connections

samples/chat/http_impl.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.
 
 // Global constants.
 class Const {
   // Bytes for "HTTP/1.0".
   static final HTTP10 = const [72, 84, 84, 80, 47, 49, 46, 48];
   // Bytes for "HTTP/1.1".
   static final HTTP11 = const [72, 84, 84, 80, 47, 49, 46, 49];
@@ skipping 1093 matching lines @@
 // HTTP server waiting for socket connections. The connections are
 // managed by the server and as requests are received the request.
 class HTTPServerImplementation implements HTTPServer {
 
   static final BUFFER_SIZE = 80;
 
   HTTPServerImplementation () : _debugTrace = false;
 
   void listen(String host, int port, var callback) {
 
-    void connectionHandler() {
+    void connectionHandler(Socket socket) {
       // Accept the client connection.
-      Socket socket = _server.accept();
       HTTPConnection connection = new HTTPConnection(socket);
       connection.requestReceived = callback;
       _connections.addLast(connection);
       _connectionsCount++;
       if (_debugTrace) {
         print("New connection (total $_connectionsCount connections)");
       }
     }
 
     _connections = new Queue<HTTPConnection>();
@@ skipping 353 matching lines @@
 
     // Return connection.
     sockets.addFirst(socketConn);
     socketConn._markReturned();
   }
 
   Map<String, Queue<SocketConnection>> _openSockets;
   Timer _evictionTimer;
   bool _shutdown;  // Has this HTTP client been shutdown?
 }