Support typedef type literals

tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart

Index: tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart
diff --git a/tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart b/tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart
index bd6b25ac994cc0a117c4ad78e2f98550567e230c..b65f5b69960bd2a0dc0c106aaa89df52068ab5a7 100644
--- a/tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart
+++ b/tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart
@@ -77,6 +77,8 @@ class Generic<T> {
 
 var toplevel;
 
+typedef Typedef();
+
 main() {
   foo();
   bar(true);
@@ -137,6 +139,8 @@ main() {
     return 400 + x;
   };
   x = f(x);
+  x = Object;
+  x = Typedef;
   return x;
 }
 typedef NoArg();