Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart

Index: sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart
diff --git a/sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart b/sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart
deleted file mode 100644
index 36e4471af8489a1388faf4b37fd3978c7b9e5ba4..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart
+++ /dev/null
@@ -1,57 +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 'package:path/path.dart' as p;
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-main() {
-  initConfig();
-  integration("upgrades a snapshot when a dependency is upgraded", () {
-    servePackages((builder) {
-      builder.serve("foo", "1.2.3", pubspec: {
-        "dependencies": {"bar": "any"}
-      }, contents: [
-        d.dir("bin", [
-          d.file("hello.dart", """
-import 'package:bar/bar.dart';
-
-void main() => print(message);
-""")
-        ])
-      ]);
-      builder.serve("bar", "1.2.3", contents: [
-        d.dir("lib", [d.file("bar.dart", "final message = 'hello!';")])
-      ]);
-    });
-
-    d.appDir({"foo": "any"}).create();
-
-    pubGet(output: contains("Precompiled foo:hello."));
-
-    d.dir(p.join(appPath, '.pub', 'bin', 'foo'), [
-      d.matcherFile('hello.dart.snapshot', contains('hello!'))
-    ]).validate();
-
-    servePackages((builder) {
-      builder.serve("bar", "1.2.4", contents: [
-        d.dir("lib", [d.file("bar.dart", "final message = 'hello 2!';")]),
-      ]);
-    });
-
-    pubUpgrade(output: contains("Precompiled foo:hello."));
-
-    d.dir(p.join(appPath, '.pub', 'bin', 'foo'), [
-      d.matcherFile('hello.dart.snapshot', contains('hello 2!'))
-    ]).validate();
-
-    var process = pubRun(args: ['foo:hello']);
-    process.stdout.expect("hello 2!");
-    process.shouldExit();
-  });
-}