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

sdk/lib/_internal/pub_generated/test/serve/gets_first_if_dev_dependency_changed_test.dart

Index: sdk/lib/_internal/pub_generated/test/serve/gets_first_if_dev_dependency_changed_test.dart
diff --git a/sdk/lib/_internal/pub/test/serve/gets_first_if_dev_dependency_changed_test.dart b/sdk/lib/_internal/pub_generated/test/serve/gets_first_if_dev_dependency_changed_test.dart
similarity index 74%
copy from sdk/lib/_internal/pub/test/serve/gets_first_if_dev_dependency_changed_test.dart
copy to sdk/lib/_internal/pub_generated/test/serve/gets_first_if_dev_dependency_changed_test.dart
index 6b41d0162b7d2ccdfcebb0664750914ddc6e7373..69e8f66ac7bf24d7dba1cdf4b4f07fca64ef19e4 100644
--- a/sdk/lib/_internal/pub/test/serve/gets_first_if_dev_dependency_changed_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/serve/gets_first_if_dev_dependency_changed_test.dart
@@ -13,23 +13,19 @@ import 'utils.dart';
 main() {
   initConfig();
   integration("gets first if a dev dependency has changed", () {
-    d.dir("foo", [
-      d.libPubspec("foo", "0.0.1"),
-      d.libDir("foo")
-    ]).create();
+    d.dir("foo", [d.libPubspec("foo", "0.0.1"), d.libDir("foo")]).create();
 
     // Create a pubspec with "foo" and a lock file without it.
-    d.dir(appPath, [
-      d.pubspec({
+    d.dir(appPath, [d.pubspec({
         "name": "myapp",
         "dev_dependencies": {
-          "foo": {"path": "../foo"}
+          "foo": {
+            "path": "../foo"
+          }
         }
-      }),
-      d.file("pubspec.lock", JSON.encode({
+      }), d.file("pubspec.lock", JSON.encode({
         'packages': {}
-      }))
-    ]).create();
+      }))]).create();
 
     pubServe(shouldGetFirst: true);
     requestShouldSucceed("packages/foo/foo.dart", 'main() => "foo";');