We can now name the current VM using the service protocol.

runtime/observatory/tests/service/set_vm_name_rpc_test.dart

+// Copyright (c) 2015, 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.
+// VMOptions=--error_on_bad_type --error_on_bad_override --vm-name=Walter
+
+import 'dart:async';
+import 'package:observatory/service_io.dart';
+import 'package:unittest/unittest.dart';
+import 'test_helper.dart';
+
+var tests = [
+  (VM vm) async {
+    expect(vm.name, equals('Walter'));
+
+    Completer completer = new Completer();
+    var stream = await vm.getEventStream(VM.kVMStream);
+    var subscription;
+    subscription = stream.listen((ServiceEvent event) {
+      if (event.kind == ServiceEvent.kVMUpdate) {
+        expect(event.owner.type, equals('VM'));
+        expect(event.owner.name, equals('Barbara'));
+        subscription.cancel();
+        completer.complete();
+      }
+    });
+    
+    var result = await vm.setName('Barbara');
+    expect(result.type, equals('Success'));
+
+    await completer.future;
+    expect(vm.name, equals('Barbara'));
+  },
+];
+
+main(args) async => runVMTests(args, tests, trace_service: true);