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

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

Index: sdk/lib/_internal/pub_generated/test/serve/native_watch_replaced_file_test.dart
diff --git a/sdk/lib/_internal/pub/test/serve/native_watch_replaced_file_test.dart b/sdk/lib/_internal/pub_generated/test/serve/native_watch_replaced_file_test.dart
similarity index 69%
copy from sdk/lib/_internal/pub/test/serve/native_watch_replaced_file_test.dart
copy to sdk/lib/_internal/pub_generated/test/serve/native_watch_replaced_file_test.dart
index 8a01ae1114a0c57218adcdf6f38d4dc5d00dd299..b25721690f0fce764f6cf15bf87bc116470fdd34 100644
--- a/sdk/lib/_internal/pub/test/serve/native_watch_replaced_file_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/serve/native_watch_replaced_file_test.dart
@@ -18,21 +18,17 @@ main() {
   // This is a regression test for http://dartbug.com/21402.
   initConfig();
   withBarbackVersions("any", () {
-    integration("picks up files replaced after serving started when using the "
-        "native watcher", () {
-      d.dir(appPath, [
-        d.pubspec({
+    integration(
+        "picks up files replaced after serving started when using the "
+            "native watcher",
+        () {
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
-        d.dir("lib", [d.dir("src", [
-          d.file("transformer.dart", REWRITE_TRANSFORMER)
-        ])]),
-        d.dir("web", [
-          d.file("file.txt", "before"),
-        ]),
-        d.file("other", "after")
-      ]).create();
+            d.dir("lib", [d.dir("src", [d.file("transformer.dart", REWRITE_TRANSFORMER)])]),
+            d.dir("web", [d.file("file.txt", "before"),]),
+            d.file("other", "after")]).create();
 
       createLockFile("myapp", pkg: ["barback"]);
 
@@ -42,8 +38,11 @@ main() {
 
       schedule(() {
         // Replace file.txt by renaming other on top of it.
-        return new File(p.join(sandboxDir, appPath, "other"))
-            .rename(p.join(sandboxDir, appPath, "web", "file.txt"));
+        return new File(
+            p.join(
+                sandboxDir,
+                appPath,
+                "other")).rename(p.join(sandboxDir, appPath, "web", "file.txt"));
       });
 
       // Read the transformed file to ensure the change is actually noticed by