VM Service isolate listing

tests/standalone/vmservice/isolate_list_script.dart

Index: tests/standalone/vmservice/isolate_list_script.dart
diff --git a/tests/language/const_constructor_mixin3_test.dart b/tests/standalone/vmservice/isolate_list_script.dart
similarity index 54%
copy from tests/language/const_constructor_mixin3_test.dart
copy to tests/standalone/vmservice/isolate_list_script.dart
index c81b7d3ecf6905e5de93b5357bee9ecde95d19fd..a9cc79fe9eb57d905ad569fe7950be6b425c1d3d 100644
--- a/tests/language/const_constructor_mixin3_test.dart
+++ b/tests/standalone/vmservice/isolate_list_script.dart
@@ -2,19 +2,13 @@
 // 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.
 
-class Mixin {
-}
+library isolate_list_script;
 
-class A {
-  const A();
-}
-
-class B extends A
-    with Mixin /// 01: compile-time error
-    {
-  const B();
-}
+import 'dart:io';
 
 main() {
-  var a = const B();
+  print(''); // Print blank line to signal that we are ready.
+
+  // Wait until signaled from spawning test.
+  stdin.first.then((_) => exit(0));
 }