Replace the existing unittest APIs with the new runner infrastructure.

test/middle_exception_test.dart

Index: test/middle_exception_test.dart
diff --git a/test/middle_exception_test.dart b/test/middle_exception_test.dart
deleted file mode 100644
index 1abd02e2df2f9a15dc96701a955b257a302f4f05..0000000000000000000000000000000000000000
--- a/test/middle_exception_test.dart
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright (c) 2013, 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 unittest.middle_exception_test;
-
-import 'dart:async';
-
-import 'package:metatest/metatest.dart';
-import 'package:unittest/unittest.dart';
-
-void main() => initTests(_test);
-
-void _test(message) {
-  initMetatest(message);
-
-  expectTestResults('late exception test', () {
-    test('testOne', () {
-      expect(true, isTrue);
-    });
-    test('testTwo', () {
-      expect(true, isFalse);
-    });
-    test('testThree', () {
-      var done = expectAsync(() {});
-      new Future.sync(() {
-        expect(true, isTrue);
-        done();
-      });
-    });
-  }, [{'result': 'pass'}, {'result': 'fail',}, {'result': 'pass'}]);
-}