MD Settings: CrOS: Focus elements on dialog close

chrome/browser/resources/settings/printing_page/cups_printers.html

 <link rel="import" href="chrome://resources/html/action_link.html">
 <link rel="import" href="chrome://resources/html/action_link_css.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="cups_add_printer_dialog.html">
 <link rel="import" href="cups_printers_list.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-cups-printers">
   <template>
     <style include="settings-shared action-link">
@@ skipping 28 matching lines @@
         display: flex;
         justify-content: space-around;
       }
 
       #addPrinterErrorMessage a[is='action-link'] {
         text-transform: uppercase;
       }
     </style>
 
     <div class="settings-box first">
-      <a is="action-link" on-tap="onAddPrinterTap_"
+      <a id="addPrinter" is="action-link" on-tap="onAddPrinterTap_"
           hidden="[[!canAddPrinter_]]">
         $i18n{addCupsPrinter}
       </a>
       <div class="start" hidden="[[canAddPrinter_]]">
         <span>$i18n{addCupsPrinter}</span>
         <div class="secondary">
           $i18n{requireNetworkMessage}
         </div>
       </div>
     </div>
 
-    <settings-cups-add-printer-dialog id="addPrinterDialog">
+    <settings-cups-add-printer-dialog id="addPrinterDialog"
+        on-close="onAddPrinterDialogClose_">
     </settings-cups-add-printer-dialog>
 
     <settings-cups-printers-list printers="{{printers}}"
         search-term="[[searchTerm]]">
     </settings-cups-printers-list>
 
     <div id="message">
       <div class="center" id="addPrinterDoneMessage" hidden>
         $i18n{printerAddedSuccessfulMessage}
       </div>
       <div class="center" id="addPrinterErrorMessage" hidden>
         <span>$i18n{printerAddedFailedMessage}</span>
         <a is="action-link" on-tap="onAddPrinterTap_">
           $i18n{printerAddedTryAgainMessage}
         </a>
       </div>
     </div>
   </template>
   <script src="cups_printers.js"></script>
 </dom-module>