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

sdk/lib/_internal/pub_generated/test/dart2js/supports_configuration_with_build_test.dart

Index: sdk/lib/_internal/pub_generated/test/dart2js/supports_configuration_with_build_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/dart2js/supports_configuration_with_build_test.dart b/sdk/lib/_internal/pub_generated/test/dart2js/supports_configuration_with_build_test.dart
deleted file mode 100644
index 1c464125c41c00b6f7a908e502d8b436d6943658..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/test/dart2js/supports_configuration_with_build_test.dart
+++ /dev/null
@@ -1,95 +0,0 @@
-// Copyright (c) 2013, 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 'dart:convert';
-
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-main() {
-  initConfig();
-  integration(
-      "compiles dart.js and interop.js next to entrypoints when "
-          "dartjs is explicitly configured",
-      () {
-    // Dart2js can take a long time to compile dart code, so we increase the
-    // timeout to cope with that.
-    currentSchedule.timeout *= 3;
-
-    serve([d.dir('api', [d.dir('packages', [d.file('browser', JSON.encode({
-            'versions': [packageVersionApiMap(packageMap('browser', '1.0.0'))]
-          })),
-              d.dir(
-                  'browser',
-                  [
-                      d.dir(
-                          'versions',
-                          [
-                              d.file(
-                                  '1.0.0',
-                                  JSON.encode(
-                                      packageVersionApiMap(packageMap('browser', '1.0.0'), full: true)))])])])]),
-              d.dir(
-                  'packages',
-                  [
-                      d.dir(
-                          'browser',
-                          [
-                              d.dir(
-                                  'versions',
-                                  [
-                                      d.tar(
-                                          '1.0.0.tar.gz',
-                                          [
-                                              d.file('pubspec.yaml', yaml(packageMap("browser", "1.0.0"))),
-                                              d.dir(
-                                                  'lib',
-                                                  [
-                                                      d.file('dart.js', 'contents of dart.js'),
-                                                      d.file('interop.js', 'contents of interop.js')])])])])])]);
-
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "browser": "1.0.0"
-        },
-        "transformers": [{
-            "\$dart2js": {
-              "minify": true
-            }
-          }]
-      }),
-          d.dir(
-              'web',
-              [d.file('file.dart', 'void main() => print("hello");'),])]).create();
-
-    pubGet();
-
-    schedulePub(
-        args: ["build"],
-        output: new RegExp(r'Built 3 files to "build".'),
-        exitCode: 0);
-
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                'build',
-                [
-                    d.dir(
-                        'web',
-                        [
-                            d.matcherFile('file.dart.js', isMinifiedDart2JSOutput),
-                            d.dir(
-                                'packages',
-                                [
-                                    d.dir(
-                                        'browser',
-                                        [
-                                            d.file('dart.js', 'contents of dart.js'),
-                                            d.file('interop.js', 'contents of interop.js')])]),])])]).validate();
-  });
-}