Check in codegen test expectations.

test/codegen/expect/language/closure4_test.js

+dart_library.library('language/closure4_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__closure4_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 closure4_test = Object.create(null);
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  closure4_test.foo = function(f) {
+    return dart.dcall(f, 499);
+  };
+  dart.fn(closure4_test.foo, dynamicTodynamic());
+  closure4_test.main = function() {
+    function fun(x) {
+      if (dart.test(dart.dsend(x, '<', 3))) {
+        return closure4_test.foo(dart.fn(x => fun(x), dynamicTodynamic()));
+      } else {
+        return x;
+      }
+    }
+    dart.fn(fun, dynamicTodynamic());
+    expect$.Expect.equals(499, fun(499));
+  };
+  dart.fn(closure4_test.main, VoidTodynamic());
+  // Exports:
+  exports.closure4_test = closure4_test;
+});