My new tests made some bad assumptions about flag values.

runtime/observatory/tests/service/get_vm_rpc_test.dart

Index: runtime/observatory/tests/service/get_vm_rpc_test.dart
diff --git a/runtime/observatory/tests/service/get_vm_rpc_test.dart b/runtime/observatory/tests/service/get_vm_rpc_test.dart
index c9013368ea2477342428165fec309166809ccbe1..b43cbefbea333a59e71d74ada86fb397209c4427 100644
--- a/runtime/observatory/tests/service/get_vm_rpc_test.dart
+++ b/runtime/observatory/tests/service/get_vm_rpc_test.dart
@@ -23,7 +23,7 @@ var tests = [
     expect(result['isolates'].length, isPositive);
     expect(result['isolates'][0]['type'], equals('@Isolate'));
     expect(result['_assertsEnabled'], new isInstanceOf<bool>());
-    expect(result['_typeChecksEnabled'], true);
+    expect(result['_typeChecksEnabled'], new isInstanceOf<bool>());
   },
 ];