Update messages, and fix typing in test.

tests/compiler/dart2js/message_kind_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.
 
 import 'package:expect/expect.dart';
 import 'dart:async';
 import "package:async_helper/async_helper.dart";
 import 'package:compiler/src/diagnostics/messages.dart' show
     MessageKind,
     MessageTemplate,
     SharedMessageKind;
 
 import 'message_kind_helper.dart';
 
 main(List<String> arguments) {
   List<MessageTemplate> examples = <MessageTemplate>[];
-  List allMessageKinds =
-      MessageKind.values.toList()..addAll(SharedMessageKind.values);
+  List allMessageKinds = []
+      ..addAll(MessageKind.values)
+      ..addAll(SharedMessageKind.values);

[Lasse Reichstein Nielsen, 2016/01/25 13:44:01]

Wouldn't it be great if we had List.operator+?  :)

   for (var kind in allMessageKinds) {
     if (kind == SharedMessageKind.exampleMessage) continue;
 
     MessageTemplate template = MessageTemplate.TEMPLATES[kind];
     Expect.isNotNull(template, "No template for $kind.");
     Expect.equals(kind, template.kind,
         "Invalid MessageTemplate.kind for $kind, found ${template.kind}.");
 
     String name = '${kind.toString()}'.substring('MessageKind.'.length);
     if (!arguments.isEmpty && !arguments.contains(name)) continue;
@@ skipping 19 matching lines @@
   asyncTest(() => Future.forEach(examples, (MessageTemplate template) {
     print("Checking '${template.kind}'.");
     Stopwatch sw = new Stopwatch()..start();
     return check(template, cachedCompiler).then((var compiler) {
       cachedCompiler = compiler;
       sw.stop();
       print("Checked '${template.kind}' in ${sw.elapsedMilliseconds}ms.");
     });
   }));
 }