Kill service_test.cc tests in favor of dart tests for the service protocol.

runtime/observatory/tests/service/dominator_tree_test.dart

Index: runtime/observatory/tests/service/dominator_tree_test.dart
diff --git a/runtime/observatory/tests/service/dominator_tree_test.dart b/runtime/observatory/tests/service/dominator_tree_test.dart
index 6db7b3c95bdaffa056e08439c996afe032e4e039..35bce6acae571486ab98724823773c9214b8a8f3 100644
--- a/runtime/observatory/tests/service/dominator_tree_test.dart
+++ b/runtime/observatory/tests/service/dominator_tree_test.dart
@@ -1,7 +1,7 @@
 // Copyright (c) 2014, 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
+// VMOptions=--compile-all --error_on_bad_type --error_on_bad_override
 
 import 'package:observatory/dominator_tree.dart';
 import 'package:unittest/unittest.dart';
@@ -52,4 +52,4 @@ void nonFlowgraph() {
   var d = new Dominator();
   d.addEdges('A', ['B']);
   expect(() => d.computeDominatorTree('B'), throwsStateError);
-}
+}