Change the signature for all network bind calls.

tests/standalone/io/http_proxy_test.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.
 
 import "package:expect/expect.dart";
 import "dart:async";
 import 'dart:crypto';
 import "dart:io";
 import "dart:uri";
 import 'dart:utf';
 
 class Server {
   HttpServer server;
   bool secure;
   int proxyHops;
   List<String> directRequestPaths;
   int requestCount = 0;
 
   Server(this.proxyHops, this.directRequestPaths, this.secure);
 
   Future<Server> start() {
     var x = new Completer();
     Future f = secure
         ? HttpServer.bindSecure(
             "localhost", 0, certificateName: 'localhost_cert')
-        : HttpServer.bind("localhost");
+        : HttpServer.bind("localhost", 0);
     return f.then((s) {
       server = s;
       x.complete(this);
       server.listen((request) {
         var response = request.response;
         requestCount++;
         // Check whether a proxy or direct connection is expected.
         bool direct = directRequestPaths.fold(
             false,
             (prev, path) => prev ? prev : path == request.uri.path);
@@ skipping 53 matching lines @@
       var response = request.response;
       response.headers.set(HttpHeaders.PROXY_AUTHENTICATE,
                            "Basic, realm=realm");
       response.statusCode = HttpStatus.PROXY_AUTHENTICATION_REQUIRED;
       response.close();
     });
   }
 
   Future<ProxyServer> start() {
     var x = new Completer();
-    HttpServer.bind("localhost").then((s) {
+    HttpServer.bind("localhost", 0).then((s) {
       server = s;
       x.complete(this);
       server.listen((HttpRequest request) {
         requestCount++;
         if (username != null && password != null) {
           if (request.headers[HttpHeaders.PROXY_AUTHORIZATION] == null) {
             authenticationRequired(request);
             return;
           } else {
             Expect.equals(
@@ skipping 527 matching lines @@
   testDirectProxy();
   testProxy();
   testProxyChain();
   testProxyFromEnviroment();
   testProxyAuthenticate();
   // This test is not normally run. It can be used for locally testing
   // with a real proxy server (e.g. Apache).
   //testRealProxy();
   //testRealProxyAuth();
 }