- Change "static final" to "static const" in the tests/ directory.

tests/standalone/io/testing_server.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.
 
 class TestingServer {
 
-  static final HOST = "127.0.0.1";
-  static final INIT = 0;
-  static final SHUTDOWN = -1;
+  static const HOST = "127.0.0.1";
+  static const INIT = 0;
+  static const SHUTDOWN = -1;
 
   abstract void onConnection(Socket connection);
 
   void errorHandlerServer(Exception e) {
     Expect.fail("Server socket error $e");
   }
 
   void dispatch(message, SendPort replyTo) {
     if (message == INIT) {
       _server = new ServerSocket(HOST, 0, 10);
@@ skipping 30 matching lines @@
 
   void shutdown() {
     _sendPort.send(TestingServer.SHUTDOWN, _receivePort.toSendPort());
     _receivePort.close();
   }
 
   int _port;
   ReceivePort _receivePort;
   SendPort _sendPort;
 }