Move pub into sdk/lib/_internal.

utils/tests/pub/update/git/update_to_nonexistent_pubspec_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 'dart:io';
-
-import '../../descriptor.dart' as d;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration("updates Git packages to a nonexistent pubspec", () {
-    ensureGit();
-
-    var repo = d.git('foo.git', [
-      d.libDir('foo'),
-      d.libPubspec('foo', '1.0.0')
-    ]);
-    repo.create();
-
-    d.appDir([{"git": "../foo.git"}]).create();
-
-    schedulePub(args: ['install'],
-        output: new RegExp(r"Dependencies installed!$"));
-
-    d.dir(packagesPath, [
-      d.dir('foo', [
-        d.file('foo.dart', 'main() => "foo";')
-      ])
-    ]).validate();
-
-    repo.runGit(['rm', 'pubspec.yaml']);
-    repo.runGit(['commit', '-m', 'delete']);
-
-    schedulePub(args: ['update'],
-        error: new RegExp(r'Package "foo" doesn' "'" r't have a '
-            r'pubspec.yaml file.'),
-        exitCode: 1);
-
-    d.dir(packagesPath, [
-      d.dir('foo', [
-        d.file('foo.dart', 'main() => "foo";')
-      ])
-    ]).validate();
-  });
-}