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

sdk/lib/_internal/pub_generated/test/upgrade/report/describes_change_test.dart

Index: sdk/lib/_internal/pub_generated/test/upgrade/report/describes_change_test.dart
diff --git a/sdk/lib/_internal/pub/test/upgrade/report/describes_change_test.dart b/sdk/lib/_internal/pub_generated/test/upgrade/report/describes_change_test.dart
similarity index 65%
copy from sdk/lib/_internal/pub/test/upgrade/report/describes_change_test.dart
copy to sdk/lib/_internal/pub_generated/test/upgrade/report/describes_change_test.dart
index 18110fc4bd6aa54654e55119b655a2a6cc15febf..45eace94e581a1a25d28f49d54ec449611fc447d 100644
--- a/sdk/lib/_internal/pub/test/upgrade/report/describes_change_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/upgrade/report/describes_change_test.dart
@@ -17,27 +17,30 @@ main() {
       builder.serve("source_changed", "1.0.0");
     });
 
-    d.dir("source_changed", [
-      d.libDir("source_changed"),
-      d.libPubspec("source_changed", "2.0.0")
-    ]).create();
+    d.dir(
+        "source_changed",
+        [d.libDir("source_changed"), d.libPubspec("source_changed", "2.0.0")]).create();
 
-    d.dir("description_changed_1", [
-      d.libDir("description_changed"),
-      d.libPubspec("description_changed", "1.0.0")
-    ]).create();
+    d.dir(
+        "description_changed_1",
+        [
+            d.libDir("description_changed"),
+            d.libPubspec("description_changed", "1.0.0")]).create();
 
-    d.dir("description_changed_2", [
-      d.libDir("description_changed"),
-      d.libPubspec("description_changed", "1.0.0")
-    ]).create();
+    d.dir(
+        "description_changed_2",
+        [
+            d.libDir("description_changed"),
+            d.libPubspec("description_changed", "1.0.0")]).create();
 
     // Create the first lockfile.
     d.appDir({
       "unchanged": "any",
       "version_changed": "1.0.0",
       "source_changed": "any",
-      "description_changed": {"path": "../description_changed_1"}
+      "description_changed": {
+        "path": "../description_changed_1"
+      }
     }).create();
 
     pubGet();
@@ -46,8 +49,12 @@ main() {
     d.appDir({
       "unchanged": "any",
       "version_changed": "any",
-      "source_changed": {"path": "../source_changed"},
-      "description_changed": {"path": "../description_changed_2"}
+      "source_changed": {
+        "path": "../source_changed"
+      },
+      "description_changed": {
+        "path": "../description_changed_2"
+      }
     }).create();
 
     // Upgrade everything.