Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/descriptor/tar.dart

Index: sdk/lib/_internal/pub_generated/test/descriptor/tar.dart
diff --git a/sdk/lib/_internal/pub_generated/test/descriptor/tar.dart b/sdk/lib/_internal/pub_generated/test/descriptor/tar.dart
index 2a89bbdfb1575a7cc7f84f0cb6230b912c401782..19280dc8b67f1dea9e1c5c75df4eddb1508b8e71 100644
--- a/sdk/lib/_internal/pub_generated/test/descriptor/tar.dart
+++ b/sdk/lib/_internal/pub_generated/test/descriptor/tar.dart
@@ -1,13 +1,25 @@
+// 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.
+
 library descriptor.tar;
+
 import 'dart:async';
+
 import 'package:path/path.dart' as path;
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:scheduled_test/descriptor.dart';
+
 import '../../lib/src/io.dart';
+
+/// Describes a tar file and its contents.
 class TarFileDescriptor extends DirectoryDescriptor implements
     ReadableDescriptor {
   TarFileDescriptor(String name, List<Descriptor> contents)
       : super(name, contents);
+
+  /// Creates the files and directories within this tar file, then archives
+  /// them, compresses them, and saves the result to [parentDir].
   Future<String> create([String parent]) => schedule(() {
     if (parent == null) parent = defaultRoot;
     return withTempDir((tempDir) {
@@ -24,9 +36,13 @@ class TarFileDescriptor extends DirectoryDescriptor implements
       });
     });
   }, 'creating tar file:\n${describe()}');
+
+  /// Validates that the `.tar.gz` file at [path] contains the expected
+  /// contents.
   Future validate([String parent]) {
     throw new UnimplementedError("TODO(nweiz): implement this");
   }
+
   Stream<List<int>> read() {
     return new Stream<List<int>>.fromFuture(withTempDir((tempDir) {
       return create(