Check in codegen test expectations.

test/codegen/expect/language/inferrer_constructor4_test.js

+dart_library.library('language/inferrer_constructor4_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__inferrer_constructor4_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 inferrer_constructor4_test = Object.create(null);
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidToB = () => (VoidToB = dart.constFn(dart.definiteFunctionType(inferrer_constructor4_test.B, [])))();
+  let dynamicTobool = () => (dynamicTobool = dart.constFn(dart.definiteFunctionType(core.bool, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  inferrer_constructor4_test.escape = function(object) {
+    core.print(dart.dsend(dart.dload(object, 'field'), '+', 42));
+  };
+  dart.fn(inferrer_constructor4_test.escape, dynamicTodynamic());
+  inferrer_constructor4_test.A = class A extends core.Object {
+    new() {
+      inferrer_constructor4_test.escape(this);
+    }
+  };
+  dart.setSignature(inferrer_constructor4_test.A, {
+    constructors: () => ({new: dart.definiteFunctionType(inferrer_constructor4_test.A, [])})
+  });
+  inferrer_constructor4_test.B = class B extends inferrer_constructor4_test.A {
+    new() {
+      this.field = null;
+      super.new();
+      this.field = 42;
+    }
+  };
+  dart.setSignature(inferrer_constructor4_test.B, {
+    constructors: () => ({new: dart.definiteFunctionType(inferrer_constructor4_test.B, [])})
+  });
+  inferrer_constructor4_test.main = function() {
+    expect$.Expect.throws(dart.fn(() => new inferrer_constructor4_test.B(), VoidToB()), dart.fn(e => core.NoSuchMethodError.is(e), dynamicTobool()));
+  };
+  dart.fn(inferrer_constructor4_test.main, VoidTodynamic());
+  // Exports:
+  exports.inferrer_constructor4_test = inferrer_constructor4_test;
+});