Support enabling of type inference with useKernel

tests/compiler/dart2js/closure/closure_test.dart

Index: tests/compiler/dart2js/closure/closure_test.dart
diff --git a/tests/compiler/dart2js/closure/closure_test.dart b/tests/compiler/dart2js/closure/closure_test.dart
index 9f067e3b46ef4195e137f159588e16b743a8c046..b2ef073527dea43c286cf0f36209358de76646f7 100644
--- a/tests/compiler/dart2js/closure/closure_test.dart
+++ b/tests/compiler/dart2js/closure/closure_test.dart
@@ -5,6 +5,7 @@
 import 'dart:io' hide Link;
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/closure.dart';
+import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/common.dart';
 import 'package:compiler/src/compiler.dart';
 import 'package:compiler/src/diagnostics/diagnostic_listener.dart';
@@ -27,6 +28,7 @@ main(List<String> args) {
     await checkTests(dataDir, computeClosureData, computeKernelClosureData,
         // TODO(johnnniwinther,efortuna): Enable these tests for .dill.
         skipForKernel: ['captured_variable.dart'],
+        options: [Flags.disableTypeInference],
         verbose: verbose);
   });
 }