Check in codegen test expectations.

test/codegen/expect/language/implicit_super_constructor_call_test.js

Index: test/codegen/expect/language/implicit_super_constructor_call_test.js
diff --git a/test/codegen/expect/language/implicit_super_constructor_call_test.js b/test/codegen/expect/language/implicit_super_constructor_call_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..63a693175df26c11f556dcb0117dcdbd7f248054
--- /dev/null
+++ b/test/codegen/expect/language/implicit_super_constructor_call_test.js
@@ -0,0 +1,37 @@
+dart_library.library('language/implicit_super_constructor_call_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__implicit_super_constructor_call_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 implicit_super_constructor_call_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  implicit_super_constructor_call_test.A = class A extends core.Object {
+    new(opts) {
+      let x = opts && 'x' in opts ? opts.x : "foo";
+      this.x = x;
+      expect$.Expect.equals("foo", dart.toString(this.x));
+    }
+  };
+  dart.setSignature(implicit_super_constructor_call_test.A, {
+    constructors: () => ({new: dart.definiteFunctionType(implicit_super_constructor_call_test.A, [], {x: dart.dynamic})})
+  });
+  implicit_super_constructor_call_test.C = class C extends implicit_super_constructor_call_test.A {
+    new(foobar) {
+      super.new();
+    }
+  };
+  dart.setSignature(implicit_super_constructor_call_test.C, {
+    constructors: () => ({new: dart.definiteFunctionType(implicit_super_constructor_call_test.C, [dart.dynamic])})
+  });
+  implicit_super_constructor_call_test.main = function() {
+    let c = new implicit_super_constructor_call_test.C(499);
+    expect$.Expect.equals("foo", dart.toString(c.x));
+  };
+  dart.fn(implicit_super_constructor_call_test.main, VoidTodynamic());
+  // Exports:
+  exports.implicit_super_constructor_call_test = implicit_super_constructor_call_test;
+});