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

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

Index: sdk/lib/_internal/pub_generated/test/dart2js/compiles_generated_dart_file_test.dart
diff --git a/sdk/lib/_internal/pub/test/dart2js/compiles_generated_dart_file_test.dart b/sdk/lib/_internal/pub_generated/test/dart2js/compiles_generated_dart_file_test.dart
similarity index 78%
copy from sdk/lib/_internal/pub/test/dart2js/compiles_generated_dart_file_test.dart
copy to sdk/lib/_internal/pub_generated/test/dart2js/compiles_generated_dart_file_test.dart
index 5254847d7e1fe6b6973e4e01bf5727e826615109..0354e436ecc4b670a07a38ead80e690f81fa024e 100644
--- a/sdk/lib/_internal/pub/test/dart2js/compiles_generated_dart_file_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/dart2js/compiles_generated_dart_file_test.dart
@@ -12,22 +12,16 @@ main() {
   initConfig();
   withBarbackVersions("any", () {
     integration("compiles a generated Dart file to JS", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "version": "0.0.1",
           "transformers": ["myapp/transformer"]
         }),
-        d.dir("lib", [
-          d.file("transformer.dart", dartTransformer("munge"))
-        ]),
-        d.dir("web", [
-          d.file("main.dart", """
+            d.dir("lib", [d.file("transformer.dart", dartTransformer("munge"))]),
+            d.dir("web", [d.file("main.dart", """
 const TOKEN = "before";
 void main() => print(TOKEN);
-""")
-        ])
-      ]).create();
+""")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);