Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/cache/add/package_not_found_test.dart

Index: sdk/lib/_internal/pub/test/cache/add/package_not_found_test.dart
diff --git a/sdk/lib/_internal/pub/test/cache/add/package_not_found_test.dart b/sdk/lib/_internal/pub/test/cache/add/package_not_found_test.dart
deleted file mode 100644
index 1ee9daff5dea279d11cc4f7297f78095bf32e476..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/cache/add/package_not_found_test.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright (c) 2014, 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 '../../../lib/src/exit_codes.dart' as exit_codes;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration('fails if the package cound not be found on the source', () {
-    serveNoPackages();
-
-    schedulePub(args: ["cache", "add", "foo"],
-        error: new RegExp(r"Could not find package foo at http://.*"),
-        exitCode: exit_codes.UNAVAILABLE);
-  });
-}