MD Settings: Eliminate SettingsSubpageBrowsertest.

chrome/test/data/webui/settings/easy_unlock_browsertest_chromeos.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 Easy Unlock within People section. */
 
 GEN_INCLUDE(['settings_page_browsertest.js']);
 
 /**
  * @constructor
  * @extends {SettingsPageBrowserTest}
  */
 function SettingsEasyUnlockBrowserTest() {
 }
 
 SettingsEasyUnlockBrowserTest.prototype = {
   __proto__: SettingsPageBrowserTest.prototype,
 
   /** @override */
   extraLibraries: PolymerTest.getLibraries(ROOT_PATH).concat([
     'test_browser_proxy.js',
   ]),
-
-  /** @override */
-  preLoad: function() {
-    SettingsPageBrowserTest.prototype.preLoad.call(this);
-    settingsHidePagesByDefaultForTest = true;
-  },
 };
 
 // Times out on debug builders and may time out on memory bots because
 // the Settings page can take several seconds to load in a Release build
 // and several times that in a Debug build. See https://crbug.com/558434
 // and http://crbug.com/711256.
 
 // Runs easy unlock tests.
 TEST_F('SettingsEasyUnlockBrowserTest', 'DISABLED_EasyUnlock', function() {
   /**
@@ skipping 182 matching lines @@
           .then(function() {
             Polymer.dom.flush();
             expectFalse(turnOffDialog.$.dialog.open);
           });
     });
   });
 
   // Run all registered tests.
   mocha.run();
 });