Don't implicitly run "pub get".

test/run/includes_parent_directories_of_entrypoint_test.dart

 // 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.
 
 import 'package:path/path.dart' as path;
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 const SCRIPT = r"""
@@ skipping 13 matching lines @@
         d.file("a.dart", "var a = 'a';"),
         d.dir("a", [
           d.file("b.dart", "var b = 'b';"),
           d.dir("b", [
             d.file("app.dart", SCRIPT)
           ])
         ])
       ])
     ]).create();
 
-    var pub = pubRun(args: [path.join("tool", "a", "b", "app")],
-        shouldGetFirst: true);
+    pubGet();
+    var pub = pubRun(args: [path.join("tool", "a", "b", "app")]);
     pub.stdout.expect("a b");
     pub.shouldExit();
   });
 }