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

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

Index: sdk/lib/_internal/pub_generated/test/barback/subdirectories_test.dart
diff --git a/sdk/lib/_internal/pub/test/barback/subdirectories_test.dart b/sdk/lib/_internal/pub_generated/test/barback/subdirectories_test.dart
similarity index 52%
copy from sdk/lib/_internal/pub/test/barback/subdirectories_test.dart
copy to sdk/lib/_internal/pub_generated/test/barback/subdirectories_test.dart
index 92d8a954f0ae117f9f77d72b0f22c92503e5ce85..393030a256af79bb92c0b11a551223c362f71ea5 100644
--- a/sdk/lib/_internal/pub/test/barback/subdirectories_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/barback/subdirectories_test.dart
@@ -13,42 +13,38 @@ main() {
   initConfig();
 
   setUp(() {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir("web", [
-        d.dir("one", [
-          d.dir("inner", [d.file("file.txt", "one")])
-        ]),
-        d.dir("two", [
-          d.dir("inner", [d.file("file.txt", "two")])
-        ]),
-        d.dir("nope", [
-          d.dir("inner", [d.file("file.txt", "nope")])
-        ])
-      ])
-    ]).create();
+    d.dir(
+        appPath,
+        [
+            d.appPubspec(),
+            d.dir(
+                "web",
+                [
+                    d.dir("one", [d.dir("inner", [d.file("file.txt", "one")])]),
+                    d.dir("two", [d.dir("inner", [d.file("file.txt", "two")])]),
+                    d.dir("nope", [d.dir("inner", [d.file("file.txt", "nope")])])])]).create();
   });
 
   var webOne = p.join("web", "one");
   var webTwoInner = p.join("web", "two", "inner");
 
   integration("builds subdirectories", () {
-    schedulePub(args: ["build", webOne, webTwoInner],
+    schedulePub(
+        args: ["build", webOne, webTwoInner],
         output: new RegExp(r'Built 2 files to "build".'));
 
-    d.dir(appPath, [
-      d.dir("build", [
-        d.dir("web", [
-          d.dir("one", [
-            d.dir("inner", [d.file("file.txt", "one")])
-          ]),
-          d.dir("two", [
-            d.dir("inner", [d.file("file.txt", "two")])
-          ]),
-          d.nothing("nope")
-        ])
-      ])
-    ]).validate();
+    d.dir(
+        appPath,
+        [
+            d.dir(
+                "build",
+                [
+                    d.dir(
+                        "web",
+                        [
+                            d.dir("one", [d.dir("inner", [d.file("file.txt", "one")])]),
+                            d.dir("two", [d.dir("inner", [d.file("file.txt", "two")])]),
+                            d.nothing("nope")])])]).validate();
   });
 
   integration("serves subdirectories", () {