js_checker.py: Replace custom WrapperTypeCheck with ESLint's no-new-wrappers.

.eslintrc.js

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module.exports = {
   'root': true,
   'env': {
     'browser': true,
     'es6': true
   },
   'rules': {
     // Enabled checks.
     'no-extra-semi': 'error',
+    'no-new-wrappers': 'error',
     'no-restricted-properties': ['error', {
       'object': 'document',
       'property': 'getElementById',
       'message': 'Use $(\'id\') or getSVGElement(\'id\') ' +
           'from chrome://resources/js/util.js instead of ' +
           'document.getElementById(\'id\')',
       },
     ],
     'semi': ['error', 'always'],
 
     // TODO(dpapad): Add more checks according to our styleguide.
   },
 };