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

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

Index: sdk/lib/_internal/pub_generated/test/serve/gets_first_if_path_dependency_changed_test.dart
diff --git a/sdk/lib/_internal/pub/test/serve/gets_first_if_path_dependency_changed_test.dart b/sdk/lib/_internal/pub_generated/test/serve/gets_first_if_path_dependency_changed_test.dart
similarity index 57%
copy from sdk/lib/_internal/pub/test/serve/gets_first_if_path_dependency_changed_test.dart
copy to sdk/lib/_internal/pub_generated/test/serve/gets_first_if_path_dependency_changed_test.dart
index abb460ef41ade2e31e340c21bbda7481c67bf135..156e18d3469d6244e58f9e727cbb1f9a5db3d186 100644
--- a/sdk/lib/_internal/pub/test/serve/gets_first_if_path_dependency_changed_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/serve/gets_first_if_path_dependency_changed_test.dart
@@ -10,27 +10,31 @@ import 'utils.dart';
 
 main() {
   initConfig();
-  integration("gets first if a path dependency's path doesn't match the one in "
-      "the lock file", () {
-    d.dir("foo-before", [
-      d.libPubspec("foo", "0.0.1"),
-      d.libDir("foo", "before")
-    ]).create();
-
-    d.dir("foo-after", [
-      d.libPubspec("foo", "0.0.1"),
-      d.libDir("foo", "after")
-    ]).create();
+  integration(
+      "gets first if a path dependency's path doesn't match the one in "
+          "the lock file",
+      () {
+    d.dir(
+        "foo-before",
+        [d.libPubspec("foo", "0.0.1"), d.libDir("foo", "before")]).create();
+
+    d.dir(
+        "foo-after",
+        [d.libPubspec("foo", "0.0.1"), d.libDir("foo", "after")]).create();
 
     d.appDir({
-      "foo": {"path": "../foo-before"}
+      "foo": {
+        "path": "../foo-before"
+      }
     }).create();
 
     pubGet();
 
     // Change the path in the pubspec.
     d.appDir({
-      "foo": {"path": "../foo-after"}
+      "foo": {
+        "path": "../foo-after"
+      }
     }).create();
 
     pubServe(shouldGetFirst: true);