MD Settings: Restore focus when exiting various subpages, part 2.

chrome/browser/resources/settings/device_page/device_page.html

 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="device_page_browser_proxy.html">
 <link rel="import" href="display.html">
 <link rel="import" href="keyboard.html">
 <link rel="import" href="pointers.html">
 <link rel="import" href="power.html">
 <link rel="import" href="storage.html">
 <link rel="import" href="stylus.html">
 <link rel="import" href="../prefs/prefs.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_page/settings_animated_pages.html">
 <link rel="import" href="../settings_page/settings_subpage.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-device-page">
   <template>
     <style include="settings-shared"></style>
-    <settings-animated-pages id="pages" section="device">
+    <settings-animated-pages id="pages" section="device"
+        focus-config="[[focusConfig_]]">
       <neon-animatable id="main" route-path="default">
         <div id="pointersRow" class="settings-box first"
             on-tap="onPointersTap_" actionable>
           <div class="start">
             [[getPointersTitle_(hasMouse_, hasTouchpad_)]]
           </div>
           <button class="subpage-arrow" is="paper-icon-button-light"
               aria-label$="[[getPointersTitle_(hasMouse_,
                   hasTouchpad_)]]"></button>
         </div>
@@ skipping 75 matching lines @@
             associated-control="[[$$('#powerRow')]]"
             page-title="$i18n{powerTitle}">
           <settings-power enable-power-settings="[[enablePowerSettings_]]">
           </settings-power>
         </settings-subpage>
       </template>
     </settings-animated-pages>
   </template>
   <script src="device_page.js"></script>
 </dom-module>