Use scheduled_test for Pub tests.

utils/tests/pub/install/git/check_out_test.dart

Index: utils/tests/pub/install/git/check_out_test.dart
diff --git a/utils/tests/pub/install/git/check_out_test.dart b/utils/tests/pub/install/git/check_out_test.dart
index f91fd1ffdd7e09da41c499694333e74a2b27210d..dcd530bf99b85316ac37f27f7ada4fc758852b04 100644
--- a/utils/tests/pub/install/git/check_out_test.dart
+++ b/utils/tests/pub/install/git/check_out_test.dart
@@ -6,33 +6,34 @@ library pub_tests;
 
 import 'dart:io';
 
+import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   integration('checks out a package from Git', () {
     ensureGit();
 
-    git('foo.git', [
-      libDir('foo'),
-      libPubspec('foo', '1.0.0')
-    ]).scheduleCreate();
+    d.git('foo.git', [
+      d.libDir('foo'),
+      d.libPubspec('foo', '1.0.0')
+    ]).create();
 
-    appDir([{"git": "../foo.git"}]).scheduleCreate();
+    d.appDir([{"git": "../foo.git"}]).create();
 
     schedulePub(args: ['install'],
         output: new RegExp(r"Dependencies installed!$"));
 
-    dir(cachePath, [
-      dir('git', [
-        dir('cache', [gitPackageRepoCacheDir('foo')]),
-        gitPackageRevisionCacheDir('foo')
+    d.dir(cachePath, [
+      d.dir('git', [
+        d.dir('cache', [d.gitPackageRepoCacheDir('foo')]),
+        d.gitPackageRevisionCacheDir('foo')
       ])
-    ]).scheduleValidate();
+    ]).validate();
 
-    dir(packagesPath, [
-      dir('foo', [
-        file('foo.dart', 'main() => "foo";')
+    d.dir(packagesPath, [
+      d.dir('foo', [
+        d.file('foo.dart', 'main() => "foo";')
       ])
-    ]).scheduleValidate();
+    ]).validate();
   });
 }