Replace @ReflectiveTestCase() with @reflectiveTest.

pkg/analyzer/test/cancelable_future_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.cancelable_future;
 
 import 'reflective_tests.dart';
 import 'package:analyzer/src/cancelable_future.dart';
 import 'dart:async';
 import 'package:unittest/unittest.dart';
 import 'package:watcher/src/utils.dart';
 
 void main() {
   groupSep = ' | ';
   runReflectiveTests(CancelableCompleterTests);
   runReflectiveTests(CancelableFutureTests);
 }
 
-@ReflectiveTestCase()
+@reflectiveTest
 class CancelableFutureTests {
   Future test_defaultConstructor_returnValue() {
     Object obj = new Object();
     bool callbackInvoked = false;
     new CancelableFuture(() => obj).then((result) {
       expect(callbackInvoked, isFalse);
       expect(result, same(obj));
       callbackInvoked = true;
     }, onError: (error) {
       fail('Expected successful completion');
@@ skipping 103 matching lines @@
   Future test_value() {
     Object obj = new Object();
     return new CancelableFuture.value(obj).then((result) {
       expect(result, same(obj));
     }, onError: (error) {
       fail('Expected successful completion');
     });
   }
 }
 
-@ReflectiveTestCase()
+@reflectiveTest
 class CancelableCompleterTests {
   CancelableCompleter<Object> completer;
   int cancelCount = 0;
 
   void setUp() {
     completer = new CancelableCompleter<Object>(() { cancelCount++; });
   }
 
   void test_initialState() {
     expect(completer.isCompleted, isFalse);
@@ skipping 234 matching lines @@
       fail('Expected error completion');
     }, onError: (error) {
       expect(error, new isInstanceOf<FutureCanceledError>());
       // And make sure nothing else happens.
     }).then((_) => pumpEventQueue()).then((_) {
       expect(completer.isCompleted, isFalse);
       expect(cancelCount, 1);
     });
   }
 }