Store the async-await compiled pub code directly in the repo.

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

Index: sdk/lib/_internal/pub_generated/test/serve/native_watch_removed_file_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/serve/native_watch_removed_file_test.dart b/sdk/lib/_internal/pub_generated/test/serve/native_watch_removed_file_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..e05708dba69ada1e2313fcb811d82b1f035c43c3
--- /dev/null
+++ b/sdk/lib/_internal/pub_generated/test/serve/native_watch_removed_file_test.dart
@@ -0,0 +1,24 @@
+library pub_tests;
+import 'package:path/path.dart' as path;
+import 'package:scheduled_test/scheduled_test.dart';
+import '../../lib/src/io.dart';
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+import 'utils.dart';
+main() {
+  initConfig();
+  integration(
+      "stop serving a file that is removed when using the native " "watcher",
+      () {
+    d.dir(
+        appPath,
+        [d.appPubspec(), d.dir("web", [d.file("index.html", "body")])]).create();
+    pubServe(args: ["--no-force-poll"]);
+    requestShouldSucceed("index.html", "body");
+    schedule(
+        () => deleteEntry(path.join(sandboxDir, appPath, "web", "index.html")));
+    waitForBuildSuccess();
+    requestShould404("index.html");
+    endPubServe();
+  });
+}