Fix some broken tests.

test/isolate_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.
 
 import 'dart:async';
 
 import 'package:async/async.dart';
 import 'package:json_rpc_2/json_rpc_2.dart' as rpc;
 import 'package:test/test.dart';
 import 'package:vm_service_client/vm_service_client.dart';
@@ skipping 149 matching lines @@
             await other.load();
           } on VMSentinelException catch (_) {
             break;
           }
         }
 
         expect(other.onExit, completes);
       });
     });
 
-    test("onServiceExtensionAdded fires when an extension is added", () async {
+    test("onExtensionAdded fires when an extension is added", () async {
       client = await runAndConnect(main: """
         registerExtension('ext.test', (_, __) {});
       """, flags: ["--pause-isolates-on-start"]);
 
       var isolate = await (await client.getVM()).isolates.first.loadRunnable();
       await isolate.waitUntilPaused();
       await isolate.resume();
 
-      expect(await isolate.onServiceExtensionAdded.first, equals('ext.test'));
+      expect(await isolate.onExtensionAdded.first, equals('ext.test'));
     });
 
     group("onExtensionEvent", () {
       test("emits extension events", () async {
         client = await runAndConnect(main: """
           postEvent('foo', {'bar': 'baz'});
         """, flags: ["--pause-isolates-on-start"]);
 
         var isolate = await (await client.getVM()).isolates.first.load();
         await isolate.waitUntilPaused();
@@ skipping 351 matching lines @@
   var vm = await client.getVM();
   var main = vm.isolates.first;
 
   var otherFuture = client.onIsolateRunnable.first;
   await main.resume();
   var other = await otherFuture;
   await other.resume();
 
   return [main, other];
 }