Check in codegen test expectations.

test/codegen/expect/language/field_override4_test_none_multi.js

+dart_library.library('language/field_override4_test_none_multi', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__field_override4_test_none_multi(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 field_override4_test_none_multi = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  field_override4_test_none_multi.A = class A extends core.Object {};
+  field_override4_test_none_multi.B = class B extends field_override4_test_none_multi.A {
+    new() {
+      this.foo = 42;
+    }
+  };
+  field_override4_test_none_multi.main = function() {
+    expect$.Expect.equals(42, new field_override4_test_none_multi.B().foo);
+  };
+  dart.fn(field_override4_test_none_multi.main, VoidTodynamic());
+  // Exports:
+  exports.field_override4_test_none_multi = field_override4_test_none_multi;
+});