Check in codegen test expectations.

test/codegen/expect/language/constructor_duplicate_initializers_test_none_multi.js

+dart_library.library('language/constructor_duplicate_initializers_test_none_multi', null, /* Imports */[
+  'dart_sdk'
+], function load__constructor_duplicate_initializers_test_none_multi(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const constructor_duplicate_initializers_test_none_multi = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  constructor_duplicate_initializers_test_none_multi.Class = class Class extends core.Object {
+    new(v) {
+      this.field_ = v;
+    }
+    field(field_) {
+      this.field_ = field_;
+    }
+    two_fields(field_) {
+      this.field_ = field_;
+    }
+  };
+  dart.defineNamedConstructor(constructor_duplicate_initializers_test_none_multi.Class, 'field');
+  dart.defineNamedConstructor(constructor_duplicate_initializers_test_none_multi.Class, 'two_fields');
+  dart.setSignature(constructor_duplicate_initializers_test_none_multi.Class, {
+    constructors: () => ({
+      new: dart.definiteFunctionType(constructor_duplicate_initializers_test_none_multi.Class, [dart.dynamic]),
+      field: dart.definiteFunctionType(constructor_duplicate_initializers_test_none_multi.Class, [dart.dynamic]),
+      two_fields: dart.definiteFunctionType(constructor_duplicate_initializers_test_none_multi.Class, [dart.dynamic])
+    })
+  });
+  constructor_duplicate_initializers_test_none_multi.main = function() {
+    new constructor_duplicate_initializers_test_none_multi.Class(42);
+    new constructor_duplicate_initializers_test_none_multi.Class.field(42);
+    new constructor_duplicate_initializers_test_none_multi.Class.two_fields(42);
+  };
+  dart.fn(constructor_duplicate_initializers_test_none_multi.main, VoidTodynamic());
+  // Exports:
+  exports.constructor_duplicate_initializers_test_none_multi = constructor_duplicate_initializers_test_none_multi;
+});