Check in codegen test expectations.

test/codegen/expect/language/deferred_optimized_test.js

+dart_library.library('language/deferred_optimized_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__deferred_optimized_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 deferred_optimized_test = Object.create(null);
+  const deferred_constraints_lib2 = Object.create(null);
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  deferred_optimized_test.libLoaded = false;
+  deferred_optimized_test.main = function() {
+    expect$.Expect.equals(88, deferred_optimized_test.heyhey());
+    for (let i = 0; i < 30; i++) {
+      deferred_optimized_test.heyhey();
+    }
+    loadLibrary().then(dart.dynamic)(dart.fn(_ => {
+      deferred_optimized_test.libLoaded = true;
+      expect$.Expect.equals(42, deferred_optimized_test.heyhey());
+    }, dynamicTodynamic()));
+  };
+  dart.fn(deferred_optimized_test.main, VoidTodynamic());
+  deferred_optimized_test.heyhey = function() {
+    return deferred_optimized_test.barbar();
+  };
+  dart.fn(deferred_optimized_test.heyhey, VoidTodynamic());
+  deferred_optimized_test.barbar = function() {
+    if (dart.test(deferred_optimized_test.libLoaded)) {
+      return deferred_constraints_lib2.foo();
+    }
+    return 88;
+  };
+  dart.fn(deferred_optimized_test.barbar, VoidTodynamic());
+  deferred_constraints_lib2.foo = function() {
+    return 42;
+  };
+  dart.fn(deferred_constraints_lib2.foo, VoidTodynamic());
+  deferred_constraints_lib2.C = class C extends core.Object {};
+  // Exports:
+  exports.deferred_optimized_test = deferred_optimized_test;
+  exports.deferred_constraints_lib2 = deferred_constraints_lib2;
+});