Check in codegen test expectations.

test/codegen/expect/language/closure8_test.js

Index: test/codegen/expect/language/closure8_test.js
diff --git a/test/codegen/expect/language/closure8_test.js b/test/codegen/expect/language/closure8_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..8deafea0d317690ea94a2ed27e443f81f0e557ea
--- /dev/null
+++ b/test/codegen/expect/language/closure8_test.js
@@ -0,0 +1,51 @@
+dart_library.library('language/closure8_test', null, /* Imports */[
+  'dart_sdk'
+], function load__closure8_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const closure8_test = Object.create(null);
+  let A = () => (A = dart.constFn(closure8_test.A$()))();
+  let C = () => (C = dart.constFn(closure8_test.C$()))();
+  let D = () => (D = dart.constFn(closure8_test.D$()))();
+  let COfint = () => (COfint = dart.constFn(closure8_test.C$(core.int)))();
+  let DOfint = () => (DOfint = dart.constFn(closure8_test.D$(core.int)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  closure8_test.A$ = dart.generic(E => {
+    class A extends core.Object {}
+    dart.addTypeTests(A);
+    return A;
+  });
+  closure8_test.A = A();
+  closure8_test.C$ = dart.generic(E => {
+    class C extends closure8_test.A$(E) {
+      forEach(callback) {}
+    }
+    dart.setSignature(C, {
+      methods: () => ({forEach: dart.definiteFunctionType(dart.dynamic, [dart.functionType(dart.dynamic, [E])])})
+    });
+    return C;
+  });
+  closure8_test.C = C();
+  closure8_test.D$ = dart.generic(E => {
+    class D extends core.Object {
+      lala(element) {
+        E._check(element);
+      }
+    }
+    dart.addTypeTests(D);
+    dart.setSignature(D, {
+      methods: () => ({lala: dart.definiteFunctionType(dart.dynamic, [E])})
+    });
+    return D;
+  });
+  closure8_test.D = D();
+  closure8_test.main = function() {
+    let c = new (COfint())();
+    c.forEach(dart.bind(new (DOfint())(), 'lala'));
+  };
+  dart.fn(closure8_test.main, VoidTodynamic());
+  // Exports:
+  exports.closure8_test = closure8_test;
+});