Use scheduled_test for Pub tests.

utils/tests/pub/install/path/absolute_symlink_test.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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.
+// BSD-style license that can be found in the LICENSE d.file.
 
 import '../../../../../pkg/pathos/lib/path.dart' as path;
 
 import '../../../../pub/exit_codes.dart' as exit_codes;
+import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
   integration("generates a symlink with an absolute path if the dependency "
               "path was absolute", () {
-    dir("foo", [
-      libDir("foo"),
-      libPubspec("foo", "0.0.1")
-    ]).scheduleCreate();
+    d.dir("foo", [
+      d.libDir("foo"),
+      d.libPubspec("foo", "0.0.1")
+    ]).create();
 
-    dir(appPath, [
-      pubspec({
+    d.dir(appPath, [
+      d.pubspec({
         "name": "myapp",
         "dependencies": {
           "foo": {"path": path.join(sandboxDir, "foo")}
         }
       })
-    ]).scheduleCreate();
+    ]).create();
 
     schedulePub(args: ["install"],
         output: new RegExp(r"Dependencies installed!$"));
 
-    dir("moved").scheduleCreate();
+    d.dir("moved").create();
 
     // Move the app but not the package. Since the symlink is absolute, it
     // should still be able to find it.
     scheduleRename(appPath, path.join("moved", appPath));
 
-    dir("moved", [
-      dir(packagesPath, [
-        dir("foo", [
-          file("foo.dart", 'main() => "foo";')
+    d.dir("moved", [
+      d.dir(packagesPath, [
+        d.dir("foo", [
+          d.file("foo.dart", 'main() => "foo";')
         ])
       ])
-    ]).scheduleValidate();
+    ]).validate();
   });
 }