Check in codegen test expectations.

test/codegen/expect/language/generic_native_test.js

+dart_library.library('language/generic_native_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__generic_native_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 generic_native_test = Object.create(null);
+  let A = () => (A = dart.constFn(generic_native_test.A$()))();
+  let ListOfB = () => (ListOfB = dart.constFn(core.List$(generic_native_test.B)))();
+  let IterableOfB = () => (IterableOfB = dart.constFn(core.Iterable$(generic_native_test.B)))();
+  let AOfIterableOfB = () => (AOfIterableOfB = dart.constFn(generic_native_test.A$(IterableOfB())))();
+  let IterableOfC = () => (IterableOfC = dart.constFn(core.Iterable$(generic_native_test.C)))();
+  let AOfIterableOfC = () => (AOfIterableOfC = dart.constFn(generic_native_test.A$(IterableOfC())))();
+  let AOfPattern = () => (AOfPattern = dart.constFn(generic_native_test.A$(core.Pattern)))();
+  let ComparableOfString = () => (ComparableOfString = dart.constFn(core.Comparable$(core.String)))();
+  let AOfComparableOfString = () => (AOfComparableOfString = dart.constFn(generic_native_test.A$(ComparableOfString())))();
+  let ComparableOfC = () => (ComparableOfC = dart.constFn(core.Comparable$(generic_native_test.C)))();
+  let AOfComparableOfC = () => (AOfComparableOfC = dart.constFn(generic_native_test.A$(ComparableOfC())))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  generic_native_test.A$ = dart.generic(T => {
+    class A extends core.Object {
+      foo(o) {
+        return T.is(o);
+      }
+    }
+    dart.addTypeTests(A);
+    dart.setSignature(A, {
+      methods: () => ({foo: dart.definiteFunctionType(dart.dynamic, [dart.dynamic])})
+    });
+    return A;
+  });
+  generic_native_test.A = A();
+  generic_native_test.B = class B extends core.Object {};
+  generic_native_test.C = class C extends core.Object {};
+  generic_native_test.main = function() {
+    expect$.Expect.isTrue(new (AOfIterableOfB())().foo(ListOfB().new()));
+    expect$.Expect.isFalse(new (AOfIterableOfC())().foo(ListOfB().new()));
+    expect$.Expect.isTrue(new (AOfPattern())().foo('hest'));
+    expect$.Expect.isTrue(new (AOfComparableOfString())().foo('hest'));
+    expect$.Expect.isFalse(new (AOfComparableOfC())().foo('hest'));
+  };
+  dart.fn(generic_native_test.main, VoidTodynamic());
+  // Exports:
+  exports.generic_native_test = generic_native_test;
+});