Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/src/summary/summarize_elements_strong_test.dart

 // Copyright (c) 2016, 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 analyzer.test.src.summary.summarize_elements_strong_test;
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
-import '../../reflective_tests.dart';
 import '../context/abstract_context.dart';
 import 'summarize_elements_test.dart';
 import 'summary_common.dart';
 
 main() {
   groupSep = ' | ';
-  runReflectiveTests(SummarizeElementsStrongTest);
+  defineReflectiveTests(SummarizeElementsStrongTest);
 }
 
 /**
  * Override of [SummaryTest] which creates summaries from the element model
  * using strong mode.
  */
 @reflectiveTest
 class SummarizeElementsStrongTest extends SummarizeElementsTest {
   @override
   AnalysisOptionsImpl get options => super.options..strongMode = true;
 
   @override
   bool get strongMode => true;
 
   @override
   DartSdk createDartSdk() => AbstractContextTest.SHARED_STRONG_MOCK_SDK;
 }