Merge IO v2 branch to bleeding edge

tests/standalone/io/http_server_early_server_close_test.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.
 
 import "dart:async";
 import "dart:io";
 import "dart:isolate";
 
 class Server {
-  Server() {
-    HttpServer server = new HttpServer();
-    server.listen("127.0.0.1", 0);
-    port = server.port;
-    server.defaultRequestHandler =
-        (HttpRequest request, HttpResponse response) {
-          Timer.run(server.close);
-        };
-    server.onError = (e) {
-      Expect.fail("No server errors expected: $e");
-    };
+  static Future<int> start() {
+    return HttpServer.bind("127.0.0.1", 0).then((server) {
+      server.listen((HttpRequest request) {
+            Timer.run(server.close);
+          }, onError: (e) {
+            Expect.fail("No server errors expected: $e");
+          });
+      return server.port;
+    });
   }
-  int port;
 }
 
 class Client {
   Client(int port) {
     ReceivePort r = new ReceivePort();
     HttpClient client = new HttpClient();
-    HttpClientConnection c = client.get("127.0.0.1", port, "/");
-    c.onRequest = (HttpClientRequest request) {
-      request.outputStream.close();
-    };
-    c.onResponse = (HttpClientResponse response) {
-      Expect.fail("Response should not be given, as not data was returned.");
-    };
-    c.onError = (e) {
-      r.close();
-    };
+    client.get("127.0.0.1", port, "/")
+        .then((HttpClientRequest request) {
+          return request.close();
+        })
+        .then((HttpClientResponse response) {
+          Expect.fail(
+              "Response should not be given, as not data was returned.");
+        })
+        .catchError((e) {
+          r.close();
+        });
   }
 }
 
 main() {
-  Server server = new Server();
-  new Client(server.port);
+  Server.start().then((port) {
+    new Client(port);
+  });
 }