Use scheduled_test for Pub tests.

utils/tests/pub/pub_test.dart

Index: utils/tests/pub/pub_test.dart
diff --git a/utils/tests/pub/pub_test.dart b/utils/tests/pub/pub_test.dart
index 06963446ee1b20e4a622aea5e7e836e00aa7d0cb..49d70635d81c5e5217cf095a9c974fe02c636ca8 100644
--- a/utils/tests/pub/pub_test.dart
+++ b/utils/tests/pub/pub_test.dart
@@ -6,8 +6,10 @@ library pub_tests;
 
 import 'dart:io';
 
+import '../../../pkg/scheduled_test/lib/scheduled_test.dart';
+
+import 'descriptor.dart' as d;
 import 'test_pub.dart';
-import '../../../pkg/unittest/lib/unittest.dart';
 
 final USAGE_STRING = """
     Pub is a package manager for Dart.
@@ -130,9 +132,9 @@ main() {
     });
 
     integration('parses a release-style version', () {
-      dir(sdkPath, [
-        file('version', '0.1.2.0_r17645'),
-      ]).scheduleCreate();
+      d.dir(sdkPath, [
+        d.file('version', '0.1.2.0_r17645'),
+      ]).create();
 
       schedulePub(args: ['version'], output: "Pub 0.1.2+0.r17645\n");
     });
@@ -140,9 +142,9 @@ main() {
     integration('parses a dev-only style version', () {
       // The "version" file generated on developer builds is a little funky and
       // we need to make sure we don't choke on it.
-      dir(sdkPath, [
-        file('version', '0.1.2.0_r16279_bobross'),
-      ]).scheduleCreate();
+      d.dir(sdkPath, [
+        d.file('version', '0.1.2.0_r16279_bobross'),
+      ]).create();
 
       schedulePub(args: ['version'], output: "Pub 0.1.2+0.r16279.bobross\n");
     });