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

sdk/lib/_internal/pub_generated/test/run/displays_transformer_logs_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 '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 const SCRIPT = """
 import "package:myapp/lib.dart";
 main() {
@@ skipping 30 matching lines @@
     // TODO(rnystrom): Remove this when #19408 is fixed.
     transform.declareOutput(transform.primaryId);
   }
 }
 """;
 
 main() {
   initConfig();
   withBarbackVersions("any", () {
     integration('displays transformer log messages', () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
-        d.dir("lib", [
-          d.file("lib.dart", LIB),
-          d.dir("src", [
-            d.file("transformer.dart", TRANSFORMER)
-          ])
-        ]),
-        d.dir("bin", [
-          d.file("script.dart", SCRIPT)
-        ])
-      ]).create();
+            d.dir(
+                "lib",
+                [
+                    d.file("lib.dart", LIB),
+                    d.dir("src", [d.file("transformer.dart", TRANSFORMER)])]),
+            d.dir("bin", [d.file("script.dart", SCRIPT)])]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
       var pub = pubRun(args: ["script"]);
 
       // Note that the info log is only displayed here because the test
       // harness runs pub in verbose mode. By default, only the warning would
       // be shown.
       pub.stdout.expect("[Info from Logging]:");
       pub.stdout.expect("myapp|bin/script.dart.");
 
       pub.stderr.expect("[Warning from Logging]:");
       pub.stderr.expect("myapp|bin/script.dart.");
 
       pub.stdout.expect("[Info from Logging]:");
       pub.stdout.expect("myapp|lib/lib.dart.");
 
       pub.stderr.expect("[Warning from Logging]:");
       pub.stderr.expect("myapp|lib/lib.dart.");
 
       pub.stdout.expect("lib");
       pub.shouldExit();
     });
   });
 }