Rationalize arg handling for pub build and serve.

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

Index: sdk/lib/_internal/pub/test/build/missing_build_directories_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/missing_build_directories_test.dart b/sdk/lib/_internal/pub/test/build/missing_build_directories_test.dart
deleted file mode 100644
index ee64895a0a584a476bfba5cbf06841d8f23cbaf9..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/build/missing_build_directories_test.dart
+++ /dev/null
@@ -1,48 +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 '../../lib/src/exit_codes.dart' as exit_codes;
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-main() {
-  initConfig();
-
-  integration("fails if any specified build directories don't exist", () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir('example', [
-        d.file('file.txt', 'example')
-      ]),
-      d.dir('web', [
-        d.file('file.txt', 'test')
-      ])
-    ]).create();
-
-    schedulePub(args: ["build", "benchmark", "example", "test", "web"],
-        error: 'Directories "benchmark" and "test" do not exist.',
-        exitCode: exit_codes.DATA);
-  });
-
-  integration("fails if any specified build directories don't exist with JSON "
-      "output", () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir('example', [
-        d.file('file.txt', 'example')
-      ]),
-      d.dir('web', [
-        d.file('file.txt', 'test')
-      ])
-    ]).create();
-
-    schedulePub(args: ["build", "benchmark", "example", "test", "web",
-                       "--format", "json"],
-        outputJson: {
-          "error": 'Directories "benchmark" and "test" do not exist.'
-        },
-        exitCode: exit_codes.DATA);
-  });
-
-}