Check in codegen test expectations.

test/codegen/expect/language/function_subtype_typearg4_test.js

Index: test/codegen/expect/language/function_subtype_typearg4_test.js
diff --git a/test/codegen/expect/language/function_subtype_typearg4_test.js b/test/codegen/expect/language/function_subtype_typearg4_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..ffadc5c2d5e61b2c16d318a8c8919782f38ff1e9
--- /dev/null
+++ b/test/codegen/expect/language/function_subtype_typearg4_test.js
@@ -0,0 +1,31 @@
+dart_library.library('language/function_subtype_typearg4_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__function_subtype_typearg4_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const function_subtype_typearg4_test = Object.create(null);
+  let C = () => (C = dart.constFn(function_subtype_typearg4_test.C$()))();
+  let COff1 = () => (COff1 = dart.constFn(function_subtype_typearg4_test.C$(function_subtype_typearg4_test.f1)))();
+  let COff2 = () => (COff2 = dart.constFn(function_subtype_typearg4_test.C$(function_subtype_typearg4_test.f2)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  function_subtype_typearg4_test.C$ = dart.generic(T => {
+    class C extends core.Object {}
+    dart.addTypeTests(C);
+    return C;
+  });
+  function_subtype_typearg4_test.C = C();
+  function_subtype_typearg4_test.I = class I extends core.Object {};
+  function_subtype_typearg4_test.J = class J extends function_subtype_typearg4_test.I {};
+  function_subtype_typearg4_test.f1 = dart.typedef('f1', () => dart.functionType(function_subtype_typearg4_test.I, []));
+  function_subtype_typearg4_test.f2 = dart.typedef('f2', () => dart.functionType(function_subtype_typearg4_test.J, []));
+  function_subtype_typearg4_test.main = function() {
+    expect$.Expect.isTrue(COff2().is(new (COff1())()));
+  };
+  dart.fn(function_subtype_typearg4_test.main, VoidTodynamic());
+  // Exports:
+  exports.function_subtype_typearg4_test = function_subtype_typearg4_test;
+});