Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/build/utils.dart

Index: sdk/lib/_internal/pub_generated/test/build/utils.dart
diff --git a/sdk/lib/_internal/pub_generated/test/build/utils.dart b/sdk/lib/_internal/pub_generated/test/build/utils.dart
index 83908667499f0bdb971bf2a73dbbe2f5daa959c6..6160c5eefe2fbc00d9f2678aad44fc45eb156408 100644
--- a/sdk/lib/_internal/pub_generated/test/build/utils.dart
+++ b/sdk/lib/_internal/pub_generated/test/build/utils.dart
@@ -1,6 +1,15 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'dart:convert';
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
+
+/// Runs the hosted test server and serves a valid "browser" package that
+/// contains the same files (but not their contents) as the real browser
+/// package.
 void serveBrowserPackage() {
   serve([d.dir('api', [d.dir('packages', [d.file('browser', JSON.encode({
           'versions': [packageVersionApiMap(packageMap('browser', '1.0.0'))]