Fix analyzer run on bot

runtime/observatory/tests/service/debugging_inlined_finally_test.dart

Index: runtime/observatory/tests/service/debugging_inlined_finally_test.dart
diff --git a/runtime/observatory/tests/service/debugging_inlined_finally_test.dart b/runtime/observatory/tests/service/debugging_inlined_finally_test.dart
index 2c764cc5720721d04d2c1770d94f7aee7d3180f3..f786c22eff7c1ebc3ee380b3b6e6c12bd410bd55 100644
--- a/runtime/observatory/tests/service/debugging_inlined_finally_test.dart
+++ b/runtime/observatory/tests/service/debugging_inlined_finally_test.dart
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 // VMOptions=--compile-all --error_on_bad_type --error_on_bad_override
 
+import "package:expect/expect.dart";
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';