Add an integration test for analysis.highlights.

pkg/analysis_server/test/integration/analysis/test_all.dart

 // Copyright (c) 2014, 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.integration.analysis.all;
 
 import 'package:unittest/unittest.dart';
 
 import 'error_test.dart' as error_test;
 import 'get_errors_after_analysis_test.dart' as get_errors_after_analysis_test;
 import 'get_errors_before_analysis_test.dart' as get_errors_before_analysis_test;
 import 'get_hover_test.dart' as get_hover_test;
+import 'highlights_test.dart' as highlights_test;
 import 'update_content_test.dart' as update_content_test;
 
 /**
  * Utility for manually running all integration tests.
  */
 main() {
   groupSep = ' | ';
   group('analysis', () {
     error_test.main();
     get_errors_after_analysis_test.main();
     get_errors_before_analysis_test.main();
     get_hover_test.main();
+    highlights_test.main();
     update_content_test.main();
   });
 }