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

sdk/lib/_internal/pub_generated/test/cache/repair/reinstalls_hosted_packages_test.dart

-// 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.
-
-library pub_tests;
-
-import '../../descriptor.dart' as d;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration('reinstalls previously cached hosted packages', () {
-    servePackages((builder) {
-      builder.serve("foo", "1.2.3");
-      builder.serve("foo", "1.2.4");
-      builder.serve("foo", "1.2.5");
-      builder.serve("bar", "1.2.3");
-      builder.serve("bar", "1.2.4");
-    });
-
-    // Set up a cache with some broken packages.
-    d.dir(
-        cachePath,
-        [
-            d.dir(
-                'hosted',
-                [
-                    d.async(
-                        port.then(
-                            (p) =>
-                                d.dir(
-                                    'localhost%58$p',
-                                    [
-                                        d.dir("foo-1.2.3", [d.libPubspec("foo", "1.2.3"), d.file("broken.txt")]),
-                                        d.dir("foo-1.2.5", [d.libPubspec("foo", "1.2.5"), d.file("broken.txt")]),
-                                        d.dir(
-                                            "bar-1.2.4",
-                                            [d.libPubspec("bar", "1.2.4"), d.file("broken.txt")])])))])]).create();
-
-    // Repair them.
-    schedulePub(args: ["cache", "repair"], output: '''
-          Downloading bar 1.2.4...
-          Downloading foo 1.2.3...
-          Downloading foo 1.2.5...
-          Reinstalled 3 packages.''');
-
-    // The broken versions should have been replaced.
-    d.hostedCache(
-        [
-            d.dir("bar-1.2.4", [d.nothing("broken.txt")]),
-            d.dir("foo-1.2.3", [d.nothing("broken.txt")]),
-            d.dir("foo-1.2.5", [d.nothing("broken.txt")])]).validate();
-  });
-}