MD Settings: Eliminate SettingsSubpageBrowsertest.

chrome/browser/resources/settings/basic_page/basic_page.js

 // Copyright 2015 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
  * 'settings-basic-page' is the settings page containing the actual settings.
  */
 Polymer({
   is: 'settings-basic-page',
 
-  behaviors: [SettingsPageVisibility, MainPageBehavior],
+  behaviors: [MainPageBehavior],
 
   properties: {
     /** Preferences state. */
     prefs: {
       type: Object,
       notify: true,
     },
 
     showAndroidApps: Boolean,
 
     /**
      * Dictionary defining page visibility.
      * @type {!GuestModePageVisibility}
      */
-    pageVisibility: Object,
+    pageVisibility: {
+      type: Object,
+      value: function() { return {}; },
+    },
 
     advancedToggleExpanded: {
       type: Boolean,
       notify: true,
       observer: 'advancedToggleExpandedChanged_',
     },
 
     /**
      * True if a section is fully expanded to hide other sections beneath it.
      * False otherwise (even while animating a section open/closed).
@@ skipping 57 matching lines @@
       if (!newRoute.isSubpage() || newRoute.section != oldRoute.section)
         this.hasExpandedSection_ = false;
     } else {
       assert(!this.hasExpandedSection_);
     }
 
     MainPageBehaviorImpl.currentRouteChanged.call(this, newRoute, oldRoute);
   },
 
   /**
+   * @param {boolean|undefined} visibility
+   * @return {boolean}
+   * @private
+   */
+  showPage_: function(visibility) {
+    return visibility !== false;
+  },
+
+  /**
    * Queues a task to search the basic sections, then another for the advanced
    * sections.
    * @param {string} query The text to search for.
    * @return {!Promise<!settings.SearchResult>} A signal indicating that
    *     searching finished.
    */
   searchContents: function(query) {
     var whenSearchDone = [
       settings.getSearchManager().search(query, assert(this.$$('#basicPage'))),
     ];
@@ skipping 35 matching lines @@
     this.showResetProfileBanner_ = false;
   },
 
   /**
    * @return {boolean}
    * @private
    */
   shouldShowAndroidApps_: function() {
     var visibility = /** @type {boolean|undefined} */ (
         this.get('pageVisibility.androidApps'));
-    return this.showAndroidApps && this.showPage(visibility);
+    return this.showAndroidApps && this.showPage_(visibility);
   },
 
   /**
    * Hides everything but the newly expanded subpage.
    * @private
    */
   onSubpageExpanded_: function() {
     this.hasExpandedSection_ = true;
   },
 
@@ skipping 58 matching lines @@
 
   /**
    * @param {boolean} opened Whether the menu is expanded.
    * @return {string} Icon name.
    * @private
    */
   getArrowIcon_: function(opened) {
     return opened ? 'cr:arrow-drop-up' : 'cr:arrow-drop-down';
   },
 });