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

sdk/lib/_internal/pub_generated/test/barback/directory_args_test.dart

Index: sdk/lib/_internal/pub_generated/test/barback/directory_args_test.dart
diff --git a/sdk/lib/_internal/pub/test/barback/directory_args_test.dart b/sdk/lib/_internal/pub_generated/test/barback/directory_args_test.dart
similarity index 55%
copy from sdk/lib/_internal/pub/test/barback/directory_args_test.dart
copy to sdk/lib/_internal/pub_generated/test/barback/directory_args_test.dart
index 90426902fdb2153a00d961fdc703ac5a5bdd00c8..44ecc9908ed0f9635b3ae3304ea9733f47485cba 100644
--- a/sdk/lib/_internal/pub/test/barback/directory_args_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/barback/directory_args_test.dart
@@ -12,31 +12,31 @@ main() {
   initConfig();
 
   setUp(() {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir('bar', [d.file('file.txt', 'bar')]),
-      d.dir('foo', [d.file('file.txt', 'foo')]),
-      d.dir('test', [d.file('file.txt', 'test')]),
-      d.dir('web', [d.file('file.txt', 'web')])
-    ]).create();
+    d.dir(
+        appPath,
+        [
+            d.appPubspec(),
+            d.dir('bar', [d.file('file.txt', 'bar')]),
+            d.dir('foo', [d.file('file.txt', 'foo')]),
+            d.dir('test', [d.file('file.txt', 'test')]),
+            d.dir('web', [d.file('file.txt', 'web')])]).create();
   });
 
   integration("builds only the given directories", () {
-    schedulePub(args: ["build", "foo", "bar"],
+    schedulePub(
+        args: ["build", "foo", "bar"],
         output: new RegExp(r'Built 2 files to "build".'));
 
-    d.dir(appPath, [
-      d.dir('build', [
-        d.dir('bar', [
-          d.file('file.txt', 'bar')
-        ]),
-        d.dir('foo', [
-          d.file('file.txt', 'foo')
-        ]),
-        d.nothing('test'),
-        d.nothing('web')
-      ])
-    ]).validate();
+    d.dir(
+        appPath,
+        [
+            d.dir(
+                'build',
+                [
+                    d.dir('bar', [d.file('file.txt', 'bar')]),
+                    d.dir('foo', [d.file('file.txt', 'foo')]),
+                    d.nothing('test'),
+                    d.nothing('web')])]).validate();
   });
 
   integration("serves only the given directories", () {