Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/src/util/absolute_path_test.dart

 // Copyright (c) 2015, 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.util.absolute_path_test;
 
 import 'package:analyzer/src/util/absolute_path.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
-import '../../reflective_tests.dart';
 import '../../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  runReflectiveTests(AbsolutePathContextPosixTest);
-  runReflectiveTests(AbsolutePathContextWindowsTest);
+  defineReflectiveTests(AbsolutePathContextPosixTest);
+  defineReflectiveTests(AbsolutePathContextWindowsTest);
 }
 
 @reflectiveTest
 class AbsolutePathContextPosixTest {
   AbsolutePathContext context = new AbsolutePathContext(false);
 
   void test_append() {
     expect(context.append(r'/path/to', r'foo.dart'), r'/path/to/foo.dart');
   }
 
@@ skipping 106 matching lines @@
     expect(context.split(r'C:\path\to\foo'), [r'C:', r'path', r'to', r'foo']);
     expect(context.split(r'C:\path'), [r'C:', r'path']);
   }
 
   void test_suffix() {
     expect(
         context.suffix(r'C:\root\path', r'C:\root\path\a\b.dart'), r'a\b.dart');
     expect(context.suffix(r'C:\root\path', r'C:\root\other.dart'), isNull);
   }
 }