Use dom-if to hide settings pages and show explicitly.

chrome/browser/resources/settings/advanced_page/advanced_page.html

 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://md-settings/downloads_page/downloads_page.html">
 <link rel="import" href="chrome://md-settings/languages_page/languages_page.html">
 <link rel="import" href="chrome://md-settings/passwords_and_forms_page/passwords_and_forms_page.html">
 <link rel="import" href="chrome://md-settings/privacy_page/privacy_page.html">
 <link rel="import" href="chrome://md-settings/reset_page/reset_page.html">
+<link rel="import" href="chrome://md-settings/settings_page/settings_page_visibility.html">
 <link rel="import" href="chrome://md-settings/settings_page/settings_section.html">
 <link rel="import" href="chrome://md-settings/site_settings/constants.html">
 <link rel="import" href="chrome://md-settings/site_settings/site_settings_category.html">
 
 <if expr="chromeos">
 <link rel="import" href="chrome://md-settings/a11y_page/a11y_page.html">
 <link rel="import" href="chrome://md-settings/bluetooth_page/bluetooth_page.html">
 <link rel="import" href="chrome://md-settings/date_time_page/date_time_page.html">
 </if>
 
 <dom-module id="settings-advanced-page">
   <link rel="import" type="css" href="advanced_page.css">
   <template>
 <if expr="chromeos">
     <settings-section i18n-values="page-title:dateTimePageTitle"
-        current-route="[[currentRoute]]" section="dateTime">
-      <settings-date-time-page prefs="{{prefs}}">
-      </settings-date-time-page>
+        current-route="[[currentRoute]]" section="dateTime"
+        hidden$="[[!pageVisible.dateTime]]">
+      <template is="dom-if" if="[[pageVisible.dateTime]]">

[michaelpg, 2015/12/02 19:22:51]

why can't we include the <settings-section> itself in the dom-if?

[stevenjb, 2015/12/02 21:57:10]

We can, but then we have to explicitly add each section somewhwere, see
SettingsPageVisibility.showDefaultSections()

+        <settings-date-time-page prefs="{{prefs}}">
+        </settings-date-time-page>
+      </template>
     </settings-section>
 </if>
     <settings-section i18n-values="page-title:siteSettingsLocation"
-        current-route="[[currentRoute]]" section="location">
-      <site-settings-category id="locationCategory" prefs="{{prefs}}"
-        current-route="{{currentRoute}}">
-      </site-settings-category>
+        current-route="[[currentRoute]]" section="location"
+        hidden$="[[!pageVisible.location]]">
+      <template is="dom-if" if="[[pageVisible.location]]">
+        <site-settings-category prefs="{{prefs}}"
+          current-route="{{currentRoute}}">
+        </site-settings-category>
+      </template>
     </settings-section>
-
     <settings-section i18n-values="page-title:privacyPageTitle"
-        current-route="[[currentRoute]]" section="privacy">
-      <settings-privacy-page prefs="{{prefs}}"
-        current-route="{{currentRoute}}">
-      </settings-privacy-page>
+        current-route="[[currentRoute]]" section="privacy"
+        hidden$="[[!pageVisible.privacy]]">
+      <template is="dom-if" if="[[pageVisible.privacy]]">
+        <settings-privacy-page prefs="{{prefs}}"
+          current-route="{{currentRoute}}">
+        </settings-privacy-page>
+      </template>
     </settings-section>
-
 <if expr="chromeos">
     <settings-section i18n-values="page-title:bluetoothPageTitle"
-        current-route="[[currentRoute]]" section="bluetooth">
-      <settings-bluetooth-page current-route="{{currentRoute}}">
-      </settings-bluetooth-page>
+        current-route="[[currentRoute]]" section="bluetooth"
+        hidden$="[[!pageVisible.bluetooth]]">
+      <template is="dom-if" if="[[pageVisible.bluetooth]]">
+        <settings-bluetooth-page current-route="{{currentRoute}}">
+        </settings-bluetooth-page>
+      </template>
     </settings-section>
 </if>
 
-    <settings-section
-        i18n-values="page-title:passwordsAndAutofillPageTitle"
-        current-route="[[currentRoute]]" section="passwordsAndForms">
-      <settings-passwords-and-forms-page prefs="{{prefs}}"
-          current-route="{{currentRoute}}">
-      </settings-passwords-and-forms-page>
+    <settings-section i18n-values="page-title:passwordsAndAutofillPageTitle"
+        current-route="[[currentRoute]]" section="passwordsAndForms"
+        hidden$="[[!pageVisible.passwordsAndForms]]">
+      <template is="dom-if" if="[[pageVisible.passwordsAndForms]]">
+        <settings-passwords-and-forms-page prefs="{{prefs}}"
+            current-route="{{currentRoute}}">
+        </settings-passwords-and-forms-page>
+      </template>
     </settings-section>
-
     <settings-section i18n-values="page-title:languagesPageTitle"
-        current-route="[[currentRoute]]" section="languages">
-      <settings-languages-page prefs="{{prefs}}"
-          current-route="{{currentRoute}}">
-      </settings-languages-page>
+        current-route="[[currentRoute]]" section="languages"
+        hidden$="[[!pageVisible.languages]]">
+      <template is="dom-if" if="[[pageVisible.languages]]">
+        <settings-languages-page prefs="{{prefs}}"
+            current-route="{{currentRoute}}">
+        </settings-languages-page>
+      </template>
     </settings-section>
-
     <settings-section i18n-values="page-title:downloadsPageTitle"
-        current-route="[[currentRoute]]" section="downloads">
-      <settings-downloads-page prefs="{{prefs}}">
-      </settings-downloads-page>
+        current-route="[[currentRoute]]" section="downloads"
+        hidden$="[[!pageVisible.downloads]]">
+      <template is="dom-if" if="[[pageVisible.downloads]]">
+        <settings-downloads-page prefs="{{prefs}}">
+        </settings-downloads-page>
+      </template>
     </settings-section>
-
     <settings-section i18n-values="page-title:resetPageTitle"
-        current-route="[[currentRoute]]" section="reset">
-      <settings-reset-page></settings-reset-page>
+        current-route="[[currentRoute]]" section="reset"
+        hidden$="[[!pageVisible.reset]]">
+      <template is="dom-if" if="[[pageVisible.reset]]">
+        <settings-reset-page></settings-reset-page>
+      </template>
     </settings-section>
-
 <if expr="chromeos">
     <!-- TODO(dbeam): find somewhere to stuff "Add more accessibility features"
          on desktop. -->
     <settings-section i18n-values="page-title:a11yPageTitle"
-        current-route="[[currentRoute]]" section="a11y">
-      <settings-a11y-page prefs="{{prefs}}"></settings-a11y-page>
+        current-route="[[currentRoute]]" section="a11y"
+        hidden$="[[!pageVisible.a11y]]">
+      <template is="dom-if" if="[[pageVisible.a11y]]">
+        <settings-a11y-page prefs="{{prefs}}"></settings-a11y-page>
+      </template>
     </settings-section>
 </if>
   </template>
   <script src="chrome://md-settings/advanced_page/advanced_page.js"></script>
 </dom-module>