Change new List(n) to return fixed length list.

tests/standalone/io/raw_socket_write_destroy_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.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 import "dart:async";
 import "dart:io";
 import "dart:isolate";
 const SERVER_ADDRESS = "127.0.0.1";
 
 void testWriteDestroyServer() {
   int WROTE = 100000;
   RawServerSocket.bind(SERVER_ADDRESS).then((server) {
     server.listen((socket) {
       socket.writeEventsEnabled = false;
 
-      var buffer = new List.fixedLength(WROTE, fill: 0);
+      var buffer = new List.filled(WROTE, 0);
       int offset = 0;
       void write() {
         int n = socket.write(buffer, offset, buffer.length - offset);
         offset += n;
         socket.writeEventsEnabled = true;
       }
       socket.listen((e) {
         if (e == RawSocketEvent.WRITE) {
           if (offset == buffer.length) {
             socket.close();
@@ skipping 30 matching lines @@
         } else if (e == RawSocketEvent.READ_CLOSED) {
           Expect.equals(WROTE, bytes);
           socket.close();
           server.close();
         }
       });
     });
     RawSocket.connect(SERVER_ADDRESS, server.port).then((socket) {
       socket.writeEventsEnabled = false;
 
-      var buffer = new List.fixedLength(WROTE, fill: 0);
+      var buffer = new List.filled(WROTE, 0);
       int offset = 0;
       void write() {
         int n = socket.write(buffer, offset, buffer.length - offset);
         offset += n;
         socket.writeEventsEnabled = true;
       }
       socket.listen((e) {
         if (e == RawSocketEvent.WRITE) {
           if (offset == buffer.length) {
             socket.close();
           } else {
             write();
           }
         }
       });
       write();
     });
   });
 }
 
 void main() {
   testWriteDestroyServer();
   testWriteDestroyClient();
-}
+}