Enable strong-mode test suite for dartk.

tools/testing/dart/test_configurations.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.
 
 library test_configurations;
 
 import "dart:async";
 import 'dart:io';
 import "dart:math" as math;
 
@@ skipping 22 matching lines @@
   new Path('runtime/observatory/tests/service'),
   new Path('runtime/observatory/tests/observatory_ui'),
   new Path('samples'),
   new Path('samples-dev'),
   new Path('tests/benchmark_smoke'),
   new Path('tests/chrome'),
   new Path('tests/compiler/dart2js'),
   new Path('tests/compiler/dart2js_extra'),
   new Path('tests/compiler/dart2js_native'),
   new Path('tests/corelib'),
+  new Path('tests/corelib_strong'),
   new Path('tests/html'),
   new Path('tests/isolate'),
   new Path('tests/kernel'),
   new Path('tests/language'),
+  new Path('tests/language_strong'),
   new Path('tests/lib'),
+  new Path('tests/lib_strong'),
   new Path('tests/standalone'),
   new Path('tests/utils'),
   new Path('utils/tests/css'),
   new Path('utils/tests/peg'),
 ];
 
 Future testConfigurations(List<Map> configurations) async {
   var startTime = new DateTime.now();
   // Extract global options from first configuration.
   var firstConf = configurations[0];
@@ skipping 248 matching lines @@
       maxBrowserProcesses,
       startTime,
       testSuites,
       eventListener,
       allTestsFinished,
       verbose,
       recordingPath,
       recordingOutputPath,
       adbDevicePool);
 }