Fix incorrect expectation in allocations_test.

runtime/observatory/tests/service/allocations_test.dart

Index: runtime/observatory/tests/service/allocations_test.dart
diff --git a/runtime/observatory/tests/service/allocations_test.dart b/runtime/observatory/tests/service/allocations_test.dart
index 4708811d2241b2fb24d2074ede400395f5b665eb..6cd953f0e1290aa8ac63bfc69f89a146f849c61c 100644
--- a/runtime/observatory/tests/service/allocations_test.dart
+++ b/runtime/observatory/tests/service/allocations_test.dart
@@ -25,8 +25,8 @@ var tests = [
     expect(lib.classes.length, equals(1));
     return lib.classes.first.load().then((Class fooClass) {
       expect(fooClass.name, equals('Foo'));
-      expect(fooClass.newSpace.accumulated.instances +
-             fooClass.oldSpace.accumulated.instances, equals(3));
+      expect(fooClass.newSpace.current.instances +
+             fooClass.oldSpace.current.instances, equals(3));
     });
 }),