Add getClassList RPC

tests/standalone/vmservice/unknown_isolate_command_test.dart

-// Copyright (c) 2013, 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.
-
-library isolate_class_table_test;
-
-import 'dart:async';
-import 'test_helper.dart';
-import 'package:expect/expect.dart';
-
-class ClassTableTest extends VmServiceRequestHelper {
-  ClassTableTest(port, id) :
-      super('http://127.0.0.1:$port/$id/classes');
-
-  onRequestCompleted(Map reply) {
-    ClassTableHelper helper = new ClassTableHelper(reply);
-  }
-}
-
-class VMTest extends VmServiceRequestHelper {
-  VMTest(port) : super('http://127.0.0.1:$port/vm');
-
-  String _isolateId;
-  onRequestCompleted(Map reply) {
-    VMTester tester = new VMTester(reply);
-    tester.checkIsolateCount(1);
-    _isolateId = tester.getIsolateId(0);
-  }
-}
-
-main() {
-  var process = new TestLauncher('field_script.dart');
-  process.launch().then((port) {
-    var test = new VMTest(port);
-    test.makeRequest().then((_) {
-      var classTableTest = new ClassTableTest(port, test._isolateId);
-      classTableTest.makeRequest().then((_) {
-        process.requestExit();
-      });
-    });
-  });
-}