Remove Futures class, move methods to Future.

tests/standalone/io/http_auth_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:crypto';
 import 'dart:io';
 import 'dart:isolate';
 import 'dart:uri';
 import 'dart:utf';
@@ skipping 95 matching lines @@
 
   var futures = [];
   for (int i = 0; i < 5; i++) {
     futures.add(
         makeRequest(
             new Uri.fromString("http://127.0.0.1:${server.port}/test$i")));
     futures.add(
         makeRequest(
             new Uri.fromString("http://127.0.0.1:${server.port}/test$i/xxx")));
   }
-  Futures.wait(futures).then((_) {
+  Future.wait(futures).then((_) {
     server.shutdown();
     client.shutdown();
   });
 }
 
 void testBasicCredentials() {
   Server server = setupServer();
   HttpClient client = new HttpClient();
 
   Future makeRequest(Uri url) {
@@ skipping 16 matching lines @@
 
   var futures = [];
   for (int i = 0; i < 5; i++) {
     futures.add(
         makeRequest(
             new Uri.fromString("http://127.0.0.1:${server.port}/test$i")));
     futures.add(
         makeRequest(
             new Uri.fromString("http://127.0.0.1:${server.port}/test$i/xxx")));
   }
-  Futures.wait(futures).then((_) {
+  Future.wait(futures).then((_) {
     server.shutdown();
     client.shutdown();
   });
 }
 
 void testBasicAuthenticateCallback() {
   Server server = setupServer();
   HttpClient client = new HttpClient();
   bool passwordChanged = false;
 
@@ skipping 30 matching lines @@
           makeRequest(
               new Uri.fromString("http://127.0.0.1:${server.port}/test$i")));
       futures.add(
           makeRequest(
               new Uri.fromString(
                   "http://127.0.0.1:${server.port}/test$i/xxx")));
     }
     return futures;
   }
 
-  Futures.wait(makeRequests()).then((_) {
+  Future.wait(makeRequests()).then((_) {
     makeRequest(
         new Uri.fromString(
             "http://127.0.0.1:${server.port}/passwdchg")).then((_) {
       passwordChanged = true;
-      Futures.wait(makeRequests()).then((_) {
+      Future.wait(makeRequests()).then((_) {
         server.shutdown();
         client.shutdown();
       });
     });
   });
 }
 
 void testLocalServerBasic() {
   HttpClient client = new HttpClient();
 
@@ skipping 42 matching lines @@
 main() {
   testUrlUserInfo();
   testBasicNoCredentials();
   testBasicCredentials();
   testBasicAuthenticateCallback();
   // These teste are not normally run. They can be used for locally
   // testing with another web server (e.g. Apache).
   //testLocalServerBasic();
   //testLocalServerDigest();
 }