[MD settings] idle load basic and advanced pages

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

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="/a11y_page/a11y_page.html">
 <link rel="import" href="/appearance_page/appearance_page.html">
+<link rel="import" href="/controls/settings_idle_render.html">

[Dan Beam, 2017/02/02 00:19:36]

please rebase

[dschuyler, 2017/02/02 02:28:15]

Done.

 <link rel="import" href="/downloads_page/downloads_page.html">
 <link rel="import" href="/languages_page/languages_page.html">
 <link rel="import" href="/on_startup_page/on_startup_page.html">
 <link rel="import" href="/passwords_and_forms_page/passwords_and_forms_page.html">
 <link rel="import" href="/people_page/people_page.html">
 <link rel="import" href="/printing_page/printing_page.html">
 <link rel="import" href="/privacy_page/privacy_page.html">
 <link rel="import" href="/reset_page/reset_page.html">
 <link rel="import" href="/reset_page/reset_profile_banner.html">
 <link rel="import" href="/search_page/search_page.html">
@@ skipping 85 matching lines @@
         </template>
 <if expr="chromeos">
         <template is="dom-if" if="[[showPage(pageVisibility.device)]]" restamp>
           <settings-section page-title="$i18n{devicePageTitle}"
               section="device">
             <settings-device-page prefs="{{prefs}}"></settings-device-page>
           </settings-section>
         </template>
 </if>
         <template is="dom-if" if="[[showPage(pageVisibility.search)]]" restamp>
-          <settings-section page-title="$i18n{searchPageTitle}" section="search">
+          <settings-section page-title="$i18n{searchPageTitle}"
+              section="search">
             <settings-search-page prefs="{{prefs}}"></settings-search-page>
           </settings-section>
         </template>
 <if expr="chromeos">
         <template is="dom-if"
             if="[[shouldShowAndroidApps_(showAndroidApps, pageVisibility)]]"
             restamp>
           <settings-section page-title="$i18n{androidAppsPageTitle}"
               section="androidApps">
             <settings-android-apps-page prefs="{{prefs}}">
@@ skipping 13 matching lines @@
         <template is="dom-if" if="[[showPage(pageVisibility.onStartup)]]"
             restamp>
           <settings-section page-title="$i18n{onStartup}" section="onStartup">
             <settings-on-startup-page prefs="{{prefs}}">
             </settings-on-startup-page>
           </settings-section>
         </template>
       </div>
     </template>
 
-    <template is="dom-if"
-        if="[[showAdvancedSettings_(pageVisibility.advancedSettings)]]">
+    <div hidden$="[[!showAdvancedSettings_(pageVisibility.advancedSettings)]]">
       <template is="dom-if" if="[[showAdvancedToggle_(
           inSearchMode, hasExpandedSection_)]]">
         <div id="toggleSpacer"></div>
         <h2 id="toggleContainer">
           <paper-button id="advancedToggle" active="{{advancedToggleExpanded}}"
               aria-active-attribute="aria-expanded" toggles>
             <span>$i18n{advancedPageTitle}</span>
             <iron-icon icon="[[getArrowIcon_(advancedToggleExpanded)]]">
             </iron-icon>
           </paper-button>
         </h2>
       </template>
 
-      <template is="dom-if" if="[[showAdvancedPage_(
-          currentRoute_, inSearchMode, hasExpandedSection_,
-          advancedToggleExpanded)]]">
-        <div id="advancedPage">
+      <template is="settings-idle-render" id="advancedPageTemplate">
+        <div id="advancedPage" hidden$="[[!showAdvancedPage_(
+            currentRoute_, inSearchMode, hasExpandedSection_,
+            advancedToggleExpanded)]]">
 <if expr="chromeos">
           <template is="dom-if" if="[[showPage(pageVisibility.dateTime)]]"
               restamp>
             <settings-section page-title="$i18n{dateTimePageTitle}"
                 section="dateTime">
               <settings-date-time-page prefs="{{prefs}}"
                   page-visibility="[[pageVisibility.dateTime]]">
               </settings-date-time-page>
             </settings-section>
           </template>
@@ skipping 67 matching lines @@
 </if>
           <template is="dom-if" if="[[showPage(pageVisibility.reset)]]"
               restamp>
             <settings-section page-title="$i18n{resetPageTitle}"
                 section="reset">
               <settings-reset-page></settings-reset-page>
             </settings-section>
           </template>
         </div>
       </template>
-    </template>
+    </div>
   </template>
   <script src="basic_page.js"></script>
 </dom-module>