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

sdk/lib/_internal/pub_generated/test/global/binstubs/explicit_executables_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:scheduled_test/scheduled_test.dart';
+
+import '../../descriptor.dart' as d;
+import '../../test_pub.dart';
+
+main() {
+  initConfig();
+  integration("only creates binstubs for the listed executables", () {
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "executables": {
+          "one": "script",
+          "two": "script",
+          "three": "script"
+        }
+      }),
+          d.dir("bin", [d.file("script.dart", "main() => print('ok');")])]).create();
+
+    schedulePub(
+        args: [
+            "global",
+            "activate",
+            "--source",
+            "path",
+            "../foo",
+            "-x",
+            "one",
+            "--executable",
+            "three"],
+        output: contains("Installed executables one and three."));
+
+    d.dir(
+        cachePath,
+        [
+            d.dir(
+                "bin",
+                [
+                    d.matcherFile(binStubName("one"), contains("pub global run foo:script")),
+                    d.nothing(binStubName("two")),
+                    d.matcherFile(
+                        binStubName("three"),
+                        contains("pub global run foo:script"))])]).validate();
+  });
+}