Check in codegen test expectations.

test/codegen/expect/language/function_argument_test.js

Index: test/codegen/expect/language/function_argument_test.js
diff --git a/test/codegen/expect/language/function_argument_test.js b/test/codegen/expect/language/function_argument_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..c740ff4bbd8f43579fbf1359f96db22fe0517a71
--- /dev/null
+++ b/test/codegen/expect/language/function_argument_test.js
@@ -0,0 +1,34 @@
+dart_library.library('language/function_argument_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__function_argument_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_argument_test = Object.create(null);
+  let VoidToint = () => (VoidToint = dart.constFn(dart.definiteFunctionType(core.int, [])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  function_argument_test.FunctionArgumentTest = class FunctionArgumentTest extends core.Object {
+    static testMe(f) {
+      return dart.dcall(f);
+    }
+    static testMain() {
+      expect$.Expect.equals(42, function_argument_test.FunctionArgumentTest.testMe(dart.fn(() => 42, VoidToint())));
+    }
+  };
+  dart.setSignature(function_argument_test.FunctionArgumentTest, {
+    statics: () => ({
+      testMe: dart.definiteFunctionType(dart.dynamic, [core.Function]),
+      testMain: dart.definiteFunctionType(dart.void, [])
+    }),
+    names: ['testMe', 'testMain']
+  });
+  function_argument_test.main = function() {
+    function_argument_test.FunctionArgumentTest.testMain();
+  };
+  dart.fn(function_argument_test.main, VoidTodynamic());
+  // Exports:
+  exports.function_argument_test = function_argument_test;
+});