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

chrome/browser/resources/settings/basic_page/basic_page.html

Index: chrome/browser/resources/settings/basic_page/basic_page.html
diff --git a/chrome/browser/resources/settings/basic_page/basic_page.html b/chrome/browser/resources/settings/basic_page/basic_page.html
index ca8e3d90e85f5978c44e099916e9fca6bcf1b510..4c5ce9156936987ecb9e1f6c1d288542bb91b869 100644
--- a/chrome/browser/resources/settings/basic_page/basic_page.html
+++ b/chrome/browser/resources/settings/basic_page/basic_page.html
@@ -1,6 +1,7 @@
 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://md-settings/appearance_page/appearance_page.html">
 <link rel="import" href="chrome://md-settings/search_page/search_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/on_startup_page/on_startup_page.html">
 
@@ -18,53 +19,64 @@
   <link rel="import" type="css" href="basic_page.css">
   <template>
 <if expr="not chromeos">
-    <settings-section i18n-values="page-title:peoplePageTitle"
-        current-route="[[currentRoute]]" section="people">
-      <settings-signin-page current-route="{{currentRoute}}">
-      </settings-signin-page>
-    </settings-section>
+    <template is="dom-if" if="[[showPage(pageVisibility.people)]]">

[michaelpg, 2015/12/08 22:27:08]

Set the restamp attribute on all of these. It won't affect performance in prod,
but it will ensure that the section is removed from the DOM after changing the
visibility to false, which will provide more independent numbers in your subpage
tests. (Otherwise, subpage tests that run later will be slower due to all of the
other subpages co-existing in the DOM.)

restamp:
https://github.com/Polymer/polymer/blob/bab847aaf706e65b44087d3bb342d4ce80ff3...

[stevenjb, 2015/12/10 16:59:34]

You know, I did that at one point, but lost it I think in the revert. Done.

+      <settings-section i18n-values="page-title:peoplePageTitle"
+          current-route="[[currentRoute]]" section="people">
+        <settings-signin-page current-route="{{currentRoute}}">
+        </settings-signin-page>
+      </settings-section>
+    </template>
 </if>
 <if expr="chromeos">
-    <settings-section i18n-values="page-title:internetPageTitle"
-        current-route="[[currentRoute]]" section="internet">
-      <settings-internet-page current-route="{{currentRoute}}">
-      </settings-internet-page>
-    </settings-section>
+    <template is="dom-if" if="[[showPage(pageVisibility.internet)]]">
+      <settings-section i18n-values="page-title:internetPageTitle"
+          current-route="[[currentRoute]]" section="internet">
+        <settings-internet-page current-route="{{currentRoute}}">
+        </settings-internet-page>
+      </settings-section>
+    </template>
 </if>
-    <settings-section i18n-values="page-title:appearancePageTitle"
-        current-route="[[currentRoute]]" section="appearance">
-      <settings-appearance-page prefs="{{prefs}}"
-          current-route="[[currentRoute]]">
-      </settings-appearance-page>
-    </settings-section>
-
-    <settings-section i18n-values="page-title:onStartup"
-        current-route="[[currentRoute]]" section="on-startup">
-      <settings-on-startup-page prefs="{{prefs}}"
-          current-route="{{currentRoute}}">
-      </settings-on-startup-page>
-    </settings-section>
-
-    <settings-section i18n-values="page-title:searchPageTitle"
-        current-route="[[currentRoute]]" section="search">
-      <settings-search-page current-route="{{currentRoute}}">
-      </settings-search-page>
-    </settings-section>
-
+    <template is="dom-if" if="[[showPage(pageVisibility.appearance)]]">
+      <settings-section i18n-values="page-title:appearancePageTitle"
+          current-route="[[currentRoute]]" section="appearance">
+        <settings-appearance-page prefs="{{prefs}}"
+            current-route="[[currentRoute]]">
+        </settings-appearance-page>
+      </settings-section>
+    </template>
+    <template is="dom-if" if="[[showPage(pageVisibility.onStartup)]]">
+      <settings-section i18n-values="page-title:onStartup"
+          current-route="[[currentRoute]]" section="onStartup">
+        <settings-on-startup-page prefs="{{prefs}}"
+            current-route="{{currentRoute}}">
+        </settings-on-startup-page>
+      </settings-section>
+    </template>
+    <template is="dom-if" if="[[showPage(pageVisibility.search)]]">
+      <settings-section i18n-values="page-title:searchPageTitle"
+          current-route="[[currentRoute]]" section="search">
+        <settings-search-page current-route="{{currentRoute}}">
+        </settings-search-page>
+      </settings-section>
+    </template>
 <if expr="chromeos">
-    <settings-section i18n-values="page-title:usersPageTitle"
-        current-route="[[currentRoute]]" section="users">
-      <settings-users-page prefs="{{prefs}}"></settings-users-page>
-    </settings-section>
+    <template is="dom-if" if="[[showPage(pageVisibility.users)]]">
+      <settings-section i18n-values="page-title:usersPageTitle"
+          current-route="[[currentRoute]]" section="users">
+        <settings-users-page prefs="{{prefs}}"></settings-users-page>
+      </settings-section>
+    </template>
 </if>
 
 <if expr="not chromeos">
-    <settings-section i18n-values="page-title:defaultBrowser"
-        expand-container="{{expandContainer}}"
-        current-route="[[currentRoute]]" section="defaultBrowser">
-      <settings-default-browser-page>
-      </settings-default-browser-page>
-    </settings-section>
+    <template is="dom-if" if="[[showPage(pageVisibility.defaultBrowser)]]">
+      <settings-section i18n-values="page-title:defaultBrowser"
+          expand-container="{{expandContainer}}"
+          current-route="[[currentRoute]]" section="defaultBrowser">
+        <settings-default-browser-page>
+        </settings-default-browser-page>
+      </settings-section>
+    </template>
 </if>
   </template>
   <script src="basic_page.js"></script>