Added observatory_ui tests to configuration

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 13 matching lines @@
  * required by [StandardTestSuite]'s forDirectory constructor.
  * New test suites should follow this convention because it makes it much
  * simpler to add them to test.dart.  Existing test suites should be
  * moved to here, if possible.
 */
 final TEST_SUITE_DIRECTORIES = [
   new Path('pkg'),
   new Path('third_party/pkg_tested'),
   new Path('runtime/tests/vm'),
   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/html'),
   new Path('tests/isolate'),
@@ skipping 259 matching lines @@
       maxBrowserProcesses,
       startTime,
       testSuites,
       eventListener,
       allTestsFinished,
       verbose,
       recordingPath,
       recordingOutputPath,
       adbDevicePool);
 }