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

sdk/lib/_internal/pub_generated/test/global/list_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.
 
 import 'package:path/path.dart' as p;
 
 import '../../lib/src/io.dart';
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
 
   integration('lists an activated hosted package', () {
     servePackages((builder) {
       builder.serve('foo', '1.0.0');
     });
 
     schedulePub(args: ['global', 'activate', 'foo']);
 
     schedulePub(args: ['global', 'list'], output: 'foo 1.0.0');
   });
 
   integration('lists an activated Git package', () {
     ensureGit();
 
-    d.git('foo.git', [
-      d.libPubspec('foo', '1.0.0'),
-      d.dir('bin', [
-        d.file('foo.dart', 'main() => print("ok");')
-      ])
-    ]).create();
+    d.git(
+        'foo.git',
+        [
+            d.libPubspec('foo', '1.0.0'),
+            d.dir('bin', [d.file('foo.dart', 'main() => print("ok");')])]).create();
 
     schedulePub(args: ['global', 'activate', '-sgit', '../foo.git']);
 
-    schedulePub(args: ['global', 'list'],
+    schedulePub(
+        args: ['global', 'list'],
         output: 'foo 1.0.0 from Git repository "../foo.git"');
   });
 
   integration('lists an activated Path package', () {
-    d.dir('foo', [
-      d.libPubspec('foo', '1.0.0'),
-      d.dir('bin', [
-        d.file('foo.dart', 'main() => print("ok");')
-      ])
-    ]).create();
+    d.dir(
+        'foo',
+        [
+            d.libPubspec('foo', '1.0.0'),
+            d.dir('bin', [d.file('foo.dart', 'main() => print("ok");')])]).create();
 
     schedulePub(args: ['global', 'activate', '-spath', '../foo']);
 
     var path = canonicalize(p.join(sandboxDir, 'foo'));
-    schedulePub(args: ['global', 'list'],
-        output: 'foo 1.0.0 at path "$path"');
+    schedulePub(args: ['global', 'list'], output: 'foo 1.0.0 at path "$path"');
   });
 
   integration('lists activated packages in alphabetical order', () {
     servePackages((builder) {
       builder.serve('aaa', '1.0.0');
       builder.serve('bbb', '1.0.0');
       builder.serve('ccc', '1.0.0');
     });
 
     schedulePub(args: ['global', 'activate', 'ccc']);
     schedulePub(args: ['global', 'activate', 'aaa']);
     schedulePub(args: ['global', 'activate', 'bbb']);
 
     schedulePub(args: ['global', 'list'], output: '''
 aaa 1.0.0
 bbb 1.0.0
 ccc 1.0.0
 ''');
   });
 
   integration('lists nothing when no packages activated', () {
     schedulePub(args: ['global', 'list'], output: '\n');
   });
 }