Enable strict flags for all service tests

runtime/observatory/test/debugging_test.dart

Index: runtime/observatory/test/debugging_test.dart
diff --git a/runtime/observatory/test/debugging_test.dart b/runtime/observatory/test/debugging_test.dart
index c149ff72ea2e843720384292311f7c05912db1c3..cd93270e5fbd26f7cb77880802b7e462ccd31867 100644
--- a/runtime/observatory/test/debugging_test.dart
+++ b/runtime/observatory/test/debugging_test.dart
@@ -1,6 +1,7 @@
 // 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.
+// VMOptions=--compile-all --error_on_bad_type --error_on_bad_override --checked
 
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
@@ -101,7 +102,7 @@ var tests = [
       completer.complete();
     }
   });
-  
+
   return isolate.stepInto().then((isolate) {
     return completer.future;  // Wait for breakpoint events.
   });
@@ -165,7 +166,7 @@ var tests = [
       completer.complete();
     }
   });
-  
+
   // Find a specific function.
   ServiceFunction function = isolate.rootLib.functions.firstWhere(
       (f) => f.name == 'helper');