Update VM service to new isolate API

tests/standalone/vmservice/isolate_class_test.dart

Index: tests/standalone/vmservice/isolate_class_test.dart
diff --git a/tests/standalone/vmservice/isolate_class_test.dart b/tests/standalone/vmservice/isolate_class_test.dart
index 96504432bf836eafd7a77c1a48a92c1867f2f601..086ae5ef4e70626d223879263e78c55521c8cca8 100644
--- a/tests/standalone/vmservice/isolate_class_test.dart
+++ b/tests/standalone/vmservice/isolate_class_test.dart
@@ -28,10 +28,10 @@ class LibraryTest extends VmServiceRequestHelper {
   onRequestCompleted(Map reply) {
     Expect.equals('Library', reply['type']);
     Expect.equals('isolate_stacktrace_command_script', reply['name']);
-    Expect.equals(1, reply['classes'].length);
-    Expect.equals('@Class', reply['classes'][0]['type']);
-    Expect.equals('C', reply['classes'][0]['name']);
-    _classId = reply['classes'][0]['id'];
+    Expect.equals(2, reply['classes'].length);
+    Expect.equals('@Class', reply['classes'][1]['type']);
+    Expect.equals('C', reply['classes'][1]['name']);
+    _classId = reply['classes'][1]['id'];
   }
 }