Check in codegen test expectations.

test/codegen/expect/language/default_class_implicit_constructor_test.js

Index: test/codegen/expect/language/default_class_implicit_constructor_test.js
diff --git a/test/codegen/expect/language/default_class_implicit_constructor_test.js b/test/codegen/expect/language/default_class_implicit_constructor_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..70f9cb5a2e67b3c692ce5fbda01556fcb0564b0f
--- /dev/null
+++ b/test/codegen/expect/language/default_class_implicit_constructor_test.js
@@ -0,0 +1,30 @@
+dart_library.library('language/default_class_implicit_constructor_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__default_class_implicit_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 default_class_implicit_constructor_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  default_class_implicit_constructor_test.A = class A extends core.Object {
+    static new() {
+      return new default_class_implicit_constructor_test.B();
+    }
+  };
+  dart.setSignature(default_class_implicit_constructor_test.A, {
+    constructors: () => ({new: dart.definiteFunctionType(default_class_implicit_constructor_test.A, [])})
+  });
+  default_class_implicit_constructor_test.B = class B extends core.Object {};
+  default_class_implicit_constructor_test.B[dart.implements] = () => [default_class_implicit_constructor_test.A];
+  default_class_implicit_constructor_test.main = function() {
+    let val = default_class_implicit_constructor_test.A.new();
+    expect$.Expect.equals(true, default_class_implicit_constructor_test.A.is(val));
+    expect$.Expect.equals(true, default_class_implicit_constructor_test.B.is(val));
+  };
+  dart.fn(default_class_implicit_constructor_test.main, VoidTodynamic());
+  // Exports:
+  exports.default_class_implicit_constructor_test = default_class_implicit_constructor_test;
+});