Revert "Use scheduled_test for Pub tests."

utils/tests/pub/install/broken_symlink_test.dart

 // Copyright (c) 2012, 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 pub_tests;
 
 import 'dart:io';
 
 import '../../../../pkg/pathos/lib/path.dart' as path;
+import '../../../../pkg/unittest/lib/unittest.dart';
 
-import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
   integration('replaces a broken "packages" symlink', () {
-    d.dir(appPath, [
-      d.appPubspec([]),
-      d.libDir('foo'),
-      d.dir("bin")
-    ]).create();
+    dir(appPath, [
+      appPubspec([]),
+      libDir('foo'),
+      dir("bin")
+    ]).scheduleCreate();
 
     // Create a broken "packages" symlink in "bin".
     scheduleSymlink("nonexistent", path.join(appPath, "packages"));
 
     schedulePub(args: ['install'],
         output: new RegExp(r"Dependencies installed!$"));
 
-    d.dir(appPath, [
-      d.dir("bin", [
-        d.dir("packages", [
-          d.dir("myapp", [
-            d.file('foo.dart', 'main() => "foo";')
+    dir(appPath, [
+      dir("bin", [
+        dir("packages", [
+          dir("myapp", [
+            file('foo.dart', 'main() => "foo";')
           ])
         ])
       ])
-    ]).validate();
+    ]).scheduleValidate();
   });
 
   integration('replaces a broken secondary "packages" symlink', () {
-    d.dir(appPath, [
-      d.appPubspec([]),
-      d.libDir('foo'),
-      d.dir("bin")
-    ]).create();
+    dir(appPath, [
+      appPubspec([]),
+      libDir('foo'),
+      dir("bin")
+    ]).scheduleCreate();
 
     // Create a broken "packages" symlink in "bin".
     scheduleSymlink("nonexistent", path.join(appPath, "bin", "packages"));
 
     schedulePub(args: ['install'],
         output: new RegExp(r"Dependencies installed!$"));
 
-    d.dir(appPath, [
-      d.dir("bin", [
-        d.dir("packages", [
-          d.dir("myapp", [
-            d.file('foo.dart', 'main() => "foo";')
+    dir(appPath, [
+      dir("bin", [
+        dir("packages", [
+          dir("myapp", [
+            file('foo.dart', 'main() => "foo";')
           ])
         ])
       ])
-    ]).validate();
+    ]).scheduleValidate();
   });
 }