Add publishTo to pubspec and use it in pub lish.

sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_test.dart

Index: sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/nonexistent_script_test.dart b/sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_test.dart
similarity index 53%
copy from sdk/lib/_internal/pub/test/run/nonexistent_script_test.dart
copy to sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_test.dart
index ce385fc0dd9b66a487aa906055b836674412473c..f570fc848330af42c4b72db131dd6aca707c41d3 100644
--- a/sdk/lib/_internal/pub/test/run/nonexistent_script_test.dart
+++ b/sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_test.dart
@@ -2,21 +2,19 @@
 // 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 p;
-
 import '../../lib/src/exit_codes.dart' as exit_codes;
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
-  integration('Errors if the script does not exist.', () {
-    d.dir(appPath, [
-      d.appPubspec()
-    ]).create();
+  integration('does not publish if the package is private', () {
+    var pkg = packageMap("test_pkg", "1.0.0");
+    pkg["publishTo"] = "none";
+    d.dir(appPath, [d.pubspec(pkg)]).create();
 
-    var pub = pubRun(args: ["script"]);
-    pub.stderr.expect("Could not find ${p.join("bin", "script.dart")}.");
-    pub.shouldExit(exit_codes.NO_INPUT);
+    schedulePub(args: ["lish"],
+        error: "A private package cannot be published.",
+        exitCode: exit_codes.DATA);
   });
 }