Check in codegen test expectations.

test/codegen/expect/language/export_test.js

Index: test/codegen/expect/language/export_test.js
diff --git a/test/codegen/expect/language/export_test.js b/test/codegen/expect/language/export_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..e84ddf0f0f12e2c2fb5ba96f048b0107e94688a4
--- /dev/null
+++ b/test/codegen/expect/language/export_test.js
@@ -0,0 +1,33 @@
+dart_library.library('language/export_test', null, /* Imports */[
+  'dart_sdk'
+], function load__export_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const export_test = Object.create(null);
+  const export_helper1 = Object.create(null);
+  const export_helper2 = Object.create(null);
+  const export_helper3 = Object.create(null);
+  const export_helper4 = Object.create(null);
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  export_test.main = function() {
+    core.print(new export_helper1.Exported());
+    core.print(new export_helper2.ReExported());
+    core.print(new export_helper3.Exported());
+    core.print(new export_helper4.ReExported());
+  };
+  dart.fn(export_test.main, VoidTovoid());
+  export_helper2.ReExported = class ReExported extends core.Object {};
+  export_helper1.Exported = class Exported extends export_helper2.ReExported {};
+  export_helper1.ReExported = export_helper2.ReExported;
+  export_helper4.ReExported = class ReExported extends core.Object {};
+  export_helper3.Exported = class Exported extends export_helper4.ReExported {};
+  export_helper3.ReExported = export_helper4.ReExported;
+  // Exports:
+  exports.export_test = export_test;
+  exports.export_helper1 = export_helper1;
+  exports.export_helper2 = export_helper2;
+  exports.export_helper3 = export_helper3;
+  exports.export_helper4 = export_helper4;
+});