Replace @ReflectiveTestCase() with @reflectiveTest.

pkg/analysis_server/test/services/completion/invocation_computer_test.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.services.completion.invocation;
 
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/completion/invocation_computer.dart';
 import 'package:unittest/unittest.dart';
 
 import '../../reflective_tests.dart';
 import 'completion_test_util.dart';
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(InvocationComputerTest);
 }
 
-@ReflectiveTestCase()
+@reflectiveTest
 class InvocationComputerTest extends AbstractSelectorSuggestionTest {
 
   @override
   CompletionSuggestion assertSuggestInvocationField(String name, String type,
       {int relevance: COMPLETION_RELEVANCE_DEFAULT, bool isDeprecated: false}) {
     return assertSuggestField(
         name,
         type,
         relevance: relevance,
         isDeprecated: isDeprecated);
@@ skipping 139 matching lines @@
 class C {
   set x(int value) {};
 }
 void main() {int y = new C().^}''');
     return computeFull((bool result) {
       CompletionSuggestion suggestion = assertSuggestSetter('x');
       assertHasNoParameterInfo(suggestion);
     });
   }
 }