Migrate block 115.

tests/language_2/hello_dart_test.dart

 // Copyright (c) 2011, 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.
 // Simple test program invoked with an option to eagerly
 // compile all code that is loaded in the isolate.
 // VMOptions=--compile_all --error-on-bad-type --error-on-bad-override
 
 class HelloDartTest {
   static testMain() {
     print("Hello, Darter!");
   }
 }
 
 main() {
   HelloDartTest.testMain();
 }