Add a VM page to the observatory.

tests/standalone/vmservice/multiple_isolate_list_test.dart

Index: tests/standalone/vmservice/multiple_isolate_list_test.dart
diff --git a/tests/standalone/vmservice/multiple_isolate_list_test.dart b/tests/standalone/vmservice/multiple_isolate_list_test.dart
index 7a82d6fc7c6ec8e5d07bf6d0e34e4aabfe0f5b0e..017d5621ae55b7b074808e2e0745dbe60d893b66 100644
--- a/tests/standalone/vmservice/multiple_isolate_list_test.dart
+++ b/tests/standalone/vmservice/multiple_isolate_list_test.dart
@@ -8,10 +8,10 @@ import 'test_helper.dart';
 import 'package:expect/expect.dart';
 
 class MultipleIsolateListTest extends VmServiceRequestHelper {
-  MultipleIsolateListTest(port) : super('http://127.0.0.1:$port/isolates');
+  MultipleIsolateListTest(port) : super('http://127.0.0.1:$port/vm');
 
   onRequestCompleted(Map reply) {
-    IsolateListTester tester = new IsolateListTester(reply);
+    VMTester tester = new VMTester(reply);
     tester.checkIsolateCount(2);
   }
 }