MD Settings: CrOS: Focus elements on dialog close

chrome/browser/resources/settings/device_page/storage.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/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="drive_cache_dialog.html">
 <link rel="import" href="../prefs/prefs.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_shared_css.html">
 
@@ skipping 186 matching lines @@
         $i18n{storageItemDownloads}
         <div id="downloadsSize" class="secondary">
           $i18n{storageSizeComputing}
         </div>
       </div>
       <button class="icon-external" is="paper-icon-button-light"
           aria-label="$i18n{storageItemDownloads}"
           aria-describedby="downloadsSize"></button>
     </div>
     <template is="dom-if" if="[[driveEnabled_]]">
-      <div class="settings-box two-line" on-tap="onDriveCacheTap_"
-          actionable$="[[hasDriveCache_]]" >
+      <div id="driveCache" class="settings-box two-line"
+          on-tap="onDriveCacheTap_" actionable$="[[hasDriveCache_]]" >
         <div class="start">
           $i18n{storageItemDriveCache}
           <div id="driveCacheSize" class="secondary">
             $i18n{storageSizeComputing}
           </div>
         </div>
         <button id="deleteButton" is="paper-icon-button-light"
             aria-label="$i18n{storageItemDriveCache}"
             aria-describedby="driveSizeCache">
           <iron-icon icon="cr:delete"></iron-icon>
@@ skipping 31 matching lines @@
           <div id="otherUsersSize" class="secondary">
             $i18n{storageSizeComputing}
           </div>
         </div>
         <button class="subpage-arrow" is="paper-icon-button-light"
             aria-label="$i18n{storageItemOtherUsers}"
             aria-describedby="otherUsersSize"></button>
       </div>
     </template>
 
-    <settings-drive-cache-dialog id="storageDriveCache">
+    <settings-drive-cache-dialog id="storageDriveCache"
+        on-close="onCloseDriveCacheDialog_">
     </settings-drive-cache-dialog>
   </template>
   <script src="storage.js"></script>
 </dom-module>