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

tests/standalone/io/echo_server_stream_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.
 //
 // Echo server test program to test socket streams.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 library ServerTest;
 
 import "dart:io";
 import "dart:isolate";
 part "testing_server.dart";
 
 class EchoServerGame {
 
   static const MSGSIZE = 10;
   static const MESSAGES = 100;
   static const FIRSTCHAR = 65;
 
   EchoServerGame.start()
       : _receivePort = new ReceivePort(),
         _sendPort = null,
-        _buffer = new List<int>.fixedLength(MSGSIZE),
+        _buffer = new List<int>(MSGSIZE),
         _messages = 0 {
     for (int i = 0; i < MSGSIZE; i++) {
       _buffer[i] = FIRSTCHAR + i;
     }
     _sendPort = spawnFunction(startEchoServer);
     initialize();
   }
 
   void sendData() {
     int offset = 0;
@@ skipping 20 matching lines @@
     void errorHandler(e) {
       Expect.fail("Socket error $e");
     }
 
     void connectHandler() {
       _socket.listen(onData,
                      onError: errorHandler,
                      onDone: onClosed);
       _socket.add(_buffer);
       _socket.close();
-      data = new List<int>.fixedLength(MSGSIZE);
+      data = new List<int>(MSGSIZE);
     }
 
     Socket.connect(TestingServer.HOST, _port).then((s) {
       _socket = s;
       connectHandler();
     });
   }
 
   void initialize() {
     _receivePort.receive((var message, SendPort replyTo) {
@@ skipping 21 matching lines @@
   var server = new EchoServer();
   port.receive(server.dispatch);
 }
 
 
 class EchoServer extends TestingServer {
 
   static const int MSGSIZE = EchoServerGame.MSGSIZE;
 
   void onConnection(Socket connection) {
-    List<int> buffer = new List<int>.fixedLength(MSGSIZE);
+    List<int> buffer = new List<int>(MSGSIZE);
     int offset = 0;
 
     void dataReceived(List<int> data) {
       int bytesRead;
       bytesRead = data.length;
       if (bytesRead > 0) {
         buffer.setRange(offset, data.length, data);
         offset += bytesRead;
         for (int i = 0; i < offset; i++) {
           Expect.equals(EchoServerGame.FIRSTCHAR + i, buffer[i]);
         }
         if (offset == MSGSIZE) {
           connection.add(buffer);
           connection.close();
         }
       }
     }
 
     void errorHandler(e) {
       Expect.fail("Socket error $e");
     }
 
     connection.listen(dataReceived, onError: errorHandler);
   }
 }
 
 main() {
   EchoServerGame echoServerGame = new EchoServerGame.start();
 }