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

sdk/lib/_internal/pub_generated/test/snapshot/recompiles_if_the_sdk_is_out_of_date_test.dart

Index: sdk/lib/_internal/pub_generated/test/snapshot/recompiles_if_the_sdk_is_out_of_date_test.dart
diff --git a/sdk/lib/_internal/pub/test/snapshot/recompiles_if_the_sdk_is_out_of_date_test.dart b/sdk/lib/_internal/pub_generated/test/snapshot/recompiles_if_the_sdk_is_out_of_date_test.dart
similarity index 57%
copy from sdk/lib/_internal/pub/test/snapshot/recompiles_if_the_sdk_is_out_of_date_test.dart
copy to sdk/lib/_internal/pub_generated/test/snapshot/recompiles_if_the_sdk_is_out_of_date_test.dart
index 1d8d213c7102f391dd508848b4be8dd9bed1ce79..f10098fc185c5721f0c59a9d0e7356fffadfecf1 100644
--- a/sdk/lib/_internal/pub/test/snapshot/recompiles_if_the_sdk_is_out_of_date_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/snapshot/recompiles_if_the_sdk_is_out_of_date_test.dart
@@ -13,21 +13,26 @@ import '../test_pub.dart';
 
 main() {
   initConfig();
-  integration("creates a snapshot for an immediate dependency's executables",
+  integration(
+      "creates a snapshot for an immediate dependency's executables",
       () {
     servePackages((builder) {
-      builder.serve("foo", "5.6.7", contents: [
-        d.dir("bin", [d.file("hello.dart", "void main() => print('hello!');")])
-      ]);
+      builder.serve(
+          "foo",
+          "5.6.7",
+          contents: [
+              d.dir("bin", [d.file("hello.dart", "void main() => print('hello!');")])]);
     });
 
-    d.appDir({"foo": "5.6.7"}).create();
+    d.appDir({
+      "foo": "5.6.7"
+    }).create();
 
     pubGet(output: contains("Precompiled foo:hello."));
 
-    d.dir(p.join(appPath, '.pub', 'bin'), [
-      d.dir('foo', [d.outOfDateSnapshot('hello.dart.snapshot')])
-    ]).create();
+    d.dir(
+        p.join(appPath, '.pub', 'bin'),
+        [d.dir('foo', [d.outOfDateSnapshot('hello.dart.snapshot')])]).create();
 
     var process = pubRun(args: ['foo:hello']);
 
@@ -37,9 +42,12 @@ main() {
     process.stdout.expect(consumeThrough("hello!"));
     process.shouldExit();
 
-    d.dir(p.join(appPath, '.pub', 'bin'), [
-      d.file('sdk-version', '0.1.2+3'),
-      d.dir('foo', [d.matcherFile('hello.dart.snapshot', contains('hello!'))])
-    ]).create();
+    d.dir(
+        p.join(appPath, '.pub', 'bin'),
+        [
+            d.file('sdk-version', '0.1.2+3'),
+            d.dir(
+                'foo',
+                [d.matcherFile('hello.dart.snapshot', contains('hello!'))])]).create();
   });
 }