Check in codegen test expectations.

test/codegen/expect/language/regress_18535_test.js

Index: test/codegen/expect/language/regress_18535_test.js
diff --git a/test/codegen/expect/language/regress_18535_test.js b/test/codegen/expect/language/regress_18535_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..ce55af772b186f2fd8e14bd0cf053037b5ce7582
--- /dev/null
+++ b/test/codegen/expect/language/regress_18535_test.js
@@ -0,0 +1,17 @@
+dart_library.library('language/regress_18535_test', null, /* Imports */[
+  'dart_sdk'
+], function load__regress_18535_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const mirrors = dart_sdk.mirrors;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const regress_18535_test = Object.create(null);
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  regress_18535_test.main = function() {
+    core.print(mirrors.currentMirrorSystem().libraries);
+  };
+  dart.fn(regress_18535_test.main, VoidTovoid());
+  // Exports:
+  exports.regress_18535_test = regress_18535_test;
+});