Revert of MD Settings: Elim SettingsSubpageBrowsertest and SettingsPageVisibility

chrome/test/data/webui/settings/settings_main_test.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.
 
 cr.define('settings_main_page', function() {
   /**
    * Extending TestBrowserProxy even though SearchManager is not a browser proxy
    * itself. Essentially TestBrowserProxy can act as a "proxy" for any external
    * dependency, not just "browser proxies" (and maybe should be renamed to
    * TestProxy).
@@ skipping 53 matching lines @@
       var settingsMain = null;
 
       setup(function() {
         settings.navigateTo(settings.Route.BASIC);
         searchManager = new TestSearchManager();
         settings.setSearchManagerForTesting(searchManager);
         PolymerTest.clearBody();
         settingsMain = document.createElement('settings-main');
         settingsMain.prefs = settingsPrefs.prefs;
         settingsMain.toolbarSpinnerActive = false;
-        // Set default page visibility.
-        settingsMain.pageVisibility = {};
         document.body.appendChild(settingsMain);
       });
 
       teardown(function() { settingsMain.remove(); });
 
       test('searchContents() triggers SearchManager', function() {
         Polymer.dom.flush();
 
         var expectedQuery1 = 'foo';
         var expectedQuery2 = 'bar';
@@ skipping 181 matching lines @@
 
         assertPageVisibility('', '');
       });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });