Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/global/activate/reactivating_git_upgrades_test.dart

Index: sdk/lib/_internal/pub_generated/test/global/activate/reactivating_git_upgrades_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/global/activate/reactivating_git_upgrades_test.dart b/sdk/lib/_internal/pub_generated/test/global/activate/reactivating_git_upgrades_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..18b682939e2637fd277842e5218bd2b2003d153b
--- /dev/null
+++ b/sdk/lib/_internal/pub_generated/test/global/activate/reactivating_git_upgrades_test.dart
@@ -0,0 +1,40 @@
+// Copyright (c) 2014, 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.
+
+import 'package:scheduled_test/scheduled_test.dart';
+
+import '../../descriptor.dart' as d;
+import '../../test_pub.dart';
+
+main() {
+  initConfig();
+  integration('ignores previously activated git commit', () {
+    ensureGit();
+
+    d.git('foo.git', [d.libPubspec("foo", "1.0.0")]).create();
+
+    schedulePub(
+        args: ["global", "activate", "-sgit", "../foo.git"],
+        output: allOf(
+            startsWith('Resolving dependencies...\n' '+ foo 1.0.0 from git ../foo.git at '),
+            // Specific revision number goes here.
+    endsWith(
+        'Precompiling executables...\n' 'Loading source assets...\n'
+            'Activated foo 1.0.0 from Git repository "../foo.git".')));
+
+    d.git('foo.git', [d.libPubspec("foo", "1.0.1")]).commit();
+
+    // Activating it again pulls down the latest commit.
+    schedulePub(
+        args: ["global", "activate", "-sgit", "../foo.git"],
+        output: allOf(
+            startsWith(
+                'Package foo is currently active from Git repository ' '"../foo.git".\n'
+                    'Resolving dependencies...\n' '+ foo 1.0.1 from git ../foo.git at '),
+            // Specific revision number goes here.
+    endsWith(
+        'Precompiling executables...\n' 'Loading source assets...\n'
+            'Activated foo 1.0.1 from Git repository "../foo.git".')));
+  });
+}