Rationalize arg handling for pub build and serve.

sdk/lib/_internal/pub/test/build/name_arg_builds_only_that_directory_test.dart

Index: sdk/lib/_internal/pub/test/build/name_arg_builds_only_that_directory_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/name_arg_builds_only_that_directory_test.dart b/sdk/lib/_internal/pub/test/build/name_arg_builds_only_that_directory_test.dart
deleted file mode 100644
index 55badf84d6224076e59e1ef10ee121f88bc7ef8d..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/build/name_arg_builds_only_that_directory_test.dart
+++ /dev/null
@@ -1,43 +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.
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-main() {
-  initConfig();
-
-  integration("if a dir name is given, only includes that dir", () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir('asset', [
-        d.file('file.txt', 'asset')
-      ]),
-      d.dir('example', [
-        d.file('file.txt', 'example')
-      ]),
-      d.dir('web', [
-        d.file('file.txt', 'test')
-      ])
-    ]).create();
-
-    schedulePub(args: ["build", "example"],
-        output: new RegExp(r'Built 2 files to "build".'));
-
-    d.dir(appPath, [
-      d.dir('build', [
-        d.dir('example', [
-          d.file('file.txt', 'example'),
-          d.dir('assets', [
-            d.dir('myapp', [
-              d.file('file.txt', 'asset')
-            ])
-          ])
-        ]),
-        // Only example should be built.
-        d.nothing('web')
-      ])
-    ]).validate();
-  });
-}