MD Settings: reduce complexity and overhead of Languages singleton

chrome/test/data/webui/settings/languages_page_browsertest.js

 // Copyright 2016 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.
 
 /** @fileoverview Suite of tests for settings-languages-page. */
 
 /** @const {string} Path to root from chrome/test/data/webui/settings/. */
 var ROOT_PATH = '../../../../../';
 
 // Polymer BrowserTest fixture.
 GEN_INCLUDE(
     [ROOT_PATH + 'chrome/test/data/webui/polymer_browser_test_base.js']);
 // SettingsPageBrowserTest fixture.
 GEN_INCLUDE([ROOT_PATH +
              'chrome/test/data/webui/settings/settings_page_browsertest.js']);
 
-var languageSettings = languageSettings || {};
-
 /**
  * Test class for settings-languages-page UI.
  * @constructor
  * @extends {SettingsPageBrowserTest}
  */
 function SettingsLanguagesPageBrowserTest() {}
 
 SettingsLanguagesPageBrowserTest.prototype = {
   __proto__: SettingsPageBrowserTest.prototype,
 
@@ skipping 28 matching lines @@
     var languageHelper;
     suiteSetup(function() {
       advanced.set('pageVisibility.languages', true);
       Polymer.dom.flush();
 
       languagesSection = this.getSection(advanced, 'languages');
       assertTrue(!!languagesSection);
       languagesPage = languagesSection.querySelector('settings-languages-page');
       assertTrue(!!languagesPage);
 
-      languageHelper = LanguageHelperImpl.getInstance();
+      languageHelper = languagesPage.languageHelper;
       return languageHelper.whenReady();
     }.bind(this));
 
     teardown(function(done) {
       // Close the section if we're in a sub-page.
       if (settings.getCurrentRoute().isSubpage()) {
         settings.navigateTo(settings.Route.ADVANCED);
         setTimeout(done);
       } else {
         done();
@@ skipping 59 matching lines @@
         assertTrue(!!languagesPage.$$('settings-edit-dictionary-page'));
       }
     });
   }.bind(this));
 
   // TODO(michaelpg): Test more aspects of the languages UI.
 
   // Run all registered tests.
   mocha.run();
 });