Refactor Future constructors.

runtime/bin/socket_patch.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.
 
 patch class RawServerSocket  {
   /* patch */ static Future<RawServerSocket> bind([String address = "127.0.0.1",
                                                    int port = 0,
                                                    int backlog = 0]) {
     return _RawServerSocket.bind(address, port, backlog);
   }
@@ skipping 97 matching lines @@
     });
     return completer.future;
   }
 
   static Future<_NativeSocket> bind(String address,
                                     int port,
                                     int backlog) {
     var socket = new _NativeSocket.listen();
     var result = socket.nativeCreateBindListen(address, port, backlog);
     if (result is OSError) {
-      return new Future.immediateError(
+      return new Future.error(
           new SocketIOException("Failed to create server socket", result));
     }
     if (port != 0) socket.localPort = port;
-    return new Future.immediate(socket);
+    return new Future.value(socket);
   }
 
   _NativeSocket.normal() : typeFlags = TYPE_NORMAL_SOCKET {
     eventHandlers = new List(EVENT_COUNT + 1);
     _EventHandler._start();
   }
 
   _NativeSocket.listen() : typeFlags = TYPE_LISTENING_SOCKET {
     eventHandlers = new List(EVENT_COUNT + 1);
     _EventHandler._start();
@@ skipping 559 matching lines @@
           onDone: () {
             done();
           },
           cancelOnError: true);
     }
     return streamCompleter.future;
   }
 
   Future<Socket> close() {
     socket._consumerDone();
-    return new Future.immediate(socket);
+    return new Future.value(socket);
   }
 
   void write() {
     try {
       if (subscription == null) return;
       assert(buffer != null);
       // Write as much as possible.
       offset += socket._write(buffer, offset, buffer.length - offset);
       if (offset < buffer.length) {
         if (!paused) {
@@ skipping 234 matching lines @@
     _raw.onBadCertificate = callback;
   }
 
   X509Certificate get peerCertificate {
     if (_raw == null) {
      throw new StateError("peerCertificate called on destroyed SecureSocket");
     }
     return _raw.peerCertificate;
   }
 }