MD Settings: Make up/down arrow work after closing the sidenav.

chrome/browser/resources/settings/settings_ui/settings_ui.html

 <link rel="import" href="chrome://resources/cr_elements/cr_drawer/cr_drawer.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_toolbar/cr_toolbar.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="../direction_delegate.html">
 <link rel="import" href="../global_scroll_target_behavior.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../icons.html">
 <link rel="import" href="../settings_main/settings_main.html">
@@ skipping 74 matching lines @@
     <cr-toolbar page-name="$i18n{settings}"
         clear-label="$i18n{clearSearch}"
         search-prompt="$i18n{searchPrompt}"
         on-cr-toolbar-menu-tap="onMenuButtonTap_"
         spinner-active="[[toolbarSpinnerActive_]]"
         menu-label="$i18n{menuButtonLabel}"
         on-search-changed="onSearchChanged_"
         role="none"
         show-menu>
     </cr-toolbar>
-    <dialog id="drawer" is="cr-drawer">
+    <dialog id="drawer" is="cr-drawer" on-close="onMenuClosed_">
       <div class="drawer-header" tabindex="-1">$i18n{settings}</div>
       <div class="drawer-content">
         <template is="dom-if" id="drawerTemplate">
           <settings-menu page-visibility="[[pageVisibility_]]"
               show-android-apps="[[showAndroidApps_]]"
               on-iron-activate="onIronActivate_"
               advanced-opened="{{advancedOpened_}}">
           </settings-menu>
         </template>
       </div>
     </dialog>
     <div id="dropShadow"></div>
     <div id="container">
       <!-- Used by IntersectionObserver, has a 0px height intentionally -->
       <div id="intersectionProbe"></div>
-      <settings-main id="main" prefs="{{prefs}}"
+      <settings-main id="main" prefs="{{prefs}}" tabindex="-1"
+          class="no-outline"
           toolbar-spinner-active="{{toolbarSpinnerActive_}}"
           page-visibility="[[pageVisibility_]]"
           show-android-apps="[[showAndroidApps_]]"
           advanced-toggle-expanded="{{advancedOpened_}}">
       </settings-main>
     </div>
   </template>
   <script src="settings_ui.js"></script>
 </dom-module>