Check in codegen test expectations.

test/codegen/expect/language/constructor11_test.js

+dart_library.library('language/constructor11_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__constructor11_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 constructor11_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  constructor11_test.A = class A extends core.Object {
+    new(x) {
+      if (x === void 0) x = 499;
+      this.x = x;
+    }
+  };
+  dart.setSignature(constructor11_test.A, {
+    constructors: () => ({new: dart.definiteFunctionType(constructor11_test.A, [], [dart.dynamic])})
+  });
+  constructor11_test.B = class B extends constructor11_test.A {
+    new() {
+      super.new();
+    }
+  };
+  constructor11_test.X = class X extends core.Object {
+    new(x) {
+      if (x === void 0) x = 42;
+      this.x = x;
+    }
+  };
+  dart.setSignature(constructor11_test.X, {
+    constructors: () => ({new: dart.definiteFunctionType(constructor11_test.X, [], [dart.dynamic])})
+  });
+  constructor11_test.Y = class Y extends constructor11_test.X {
+    new() {
+      super.new();
+    }
+  };
+  constructor11_test.Z = class Z extends constructor11_test.Y {
+    new() {
+    }
+  };
+  dart.setSignature(constructor11_test.Z, {
+    constructors: () => ({new: dart.definiteFunctionType(constructor11_test.Z, [])})
+  });
+  constructor11_test.F = class F extends core.Object {
+    new(x) {
+      if (x === void 0) x = 99;
+      this.x = x;
+    }
+  };
+  dart.setSignature(constructor11_test.F, {
+    constructors: () => ({new: dart.definiteFunctionType(constructor11_test.F, [], [dart.dynamic])})
+  });
+  constructor11_test.G = class G extends constructor11_test.F {
+    new() {
+      super.new();
+    }
+  };
+  constructor11_test.H = class H extends constructor11_test.G {};
+  constructor11_test.main = function() {
+    expect$.Expect.equals(499, new constructor11_test.B().x);
+    expect$.Expect.equals(42, new constructor11_test.Z().x);
+    expect$.Expect.equals(99, new constructor11_test.H().x);
+  };
+  dart.fn(constructor11_test.main, VoidTodynamic());
+  // Exports:
+  exports.constructor11_test = constructor11_test;
+});