Check in codegen test expectations.

test/codegen/expect/language/mixin_typedef_constructor_test.js

Index: test/codegen/expect/language/mixin_typedef_constructor_test.js
diff --git a/test/codegen/expect/language/mixin_typedef_constructor_test.js b/test/codegen/expect/language/mixin_typedef_constructor_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..74d13159ced69c94eb1709ab7fcbdb98fdfc8538
--- /dev/null
+++ b/test/codegen/expect/language/mixin_typedef_constructor_test.js
@@ -0,0 +1,38 @@
+dart_library.library('language/mixin_typedef_constructor_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__mixin_typedef_constructor_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 mixin_typedef_constructor_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  mixin_typedef_constructor_test.A = class A extends core.Object {
+    new(field) {
+      this.field = field;
+    }
+  };
+  dart.setSignature(mixin_typedef_constructor_test.A, {
+    constructors: () => ({new: dart.definiteFunctionType(mixin_typedef_constructor_test.A, [dart.dynamic])})
+  });
+  mixin_typedef_constructor_test.Mixin = class Mixin extends core.Object {
+    new() {
+      this.mixinField = 54;
+    }
+  };
+  mixin_typedef_constructor_test.MyClass = class MyClass extends dart.mixin(mixin_typedef_constructor_test.A, mixin_typedef_constructor_test.Mixin) {
+    new(field) {
+      super.new(field);
+    }
+  };
+  mixin_typedef_constructor_test.main = function() {
+    let a = new mixin_typedef_constructor_test.MyClass(42);
+    expect$.Expect.equals(42, a.field);
+    expect$.Expect.equals(54, a.mixinField);
+  };
+  dart.fn(mixin_typedef_constructor_test.main, VoidTodynamic());
+  // Exports:
+  exports.mixin_typedef_constructor_test = mixin_typedef_constructor_test;
+});