Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/get/git/require_pubspec_name_test.dart

-// Copyright (c) 2012, 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 pub_tests;
-
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../../../lib/src/exit_codes.dart' as exit_codes;
-import '../../descriptor.dart' as d;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration('requires the dependency to have a pubspec with a name '
-      'field', () {
-    ensureGit();
-
-    d.git('foo.git', [
-      d.libDir('foo'),
-      d.pubspec({})
-    ]).create();
-
-    d.appDir({"foo": {"git": "../foo.git"}}).create();
-
-    pubGet(error: contains('Missing the required "name" field.'),
-        exitCode: exit_codes.DATA);
-  });
-}