Move pub into sdk/lib/_internal.

sdk/lib/_internal/pub/test/lish/cloud_storage_upload_provides_an_error_test.dart

 // 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:io';
 import 'dart:json' as json;
 
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:scheduled_test/scheduled_server.dart';
 
-import '../../../pub/io.dart';
+import '../../lib/src/io.dart';
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
 
 main() {
   initConfig();
   setUp(d.validPackage.create);
 
   integration('cloud storage upload provides an error', () {
     var server = new ScheduledServer();
@@ skipping 14 matching lines @@
       });
     });
 
     // TODO(nweiz): This should use the server's error message once the client
     // can parse the XML.
     expect(pub.nextErrLine(),
         completion(equals('Failed to upload the package.')));
     pub.shouldExit(1);
   });
 }