[CUPS] Fix the issue the default queue value not being persisted with each new printer setup.

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

 <link rel="import" href="chrome://resources/html/md_select_css.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/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="cups_add_printer_dialog_util.html">
 <link rel="import" href="cups_printers_browser_proxy.html">
 <link rel="import" href="../settings_shared_css.html">
@@ skipping 131 matching lines @@
         padding: 10px 20px;
       }
     </style>
     <add-printer-dialog>
       <div class="dialog-title">$i18n{addPrintersManuallyTitle}</div>
       <div class="dialog-body">
         <div class="settings-box first two-line">
           <div class="start">
             <div class="label">$i18n{printerName}</div>
             <div class="secondary">
-              <paper-input no-label-float id="printerNameInput"
+              <paper-input no-label-float id="printerNameInput" autofocus
                   value="{{newPrinter.printerName}}">
               </paper-input>
             </div>
           </div>
         </div>
         <div class="settings-box two-line">
           <div class="start">
             <div class="label">$i18n{printerAddress}</div>
             <div class="secondary">
               <paper-input no-label-float id="printerAddressInput"
@@ skipping 21 matching lines @@
                 </select>
                 <span class="md-select-underline"></span>
               </div>
             </div>
           </div>
         </div>
         <div class="settings-box two-line">
           <div class="start">
             <div class="label">$i18n{printerQueue}</div>
             <div class="secondary">
-              <paper-input no-label-float value="{{newPrinter.printerQueue}}">
+              <paper-input no-label-float id="printerQueueInput"
+                           label="ipp/print"

[xdai1, 2017/05/04 20:35:59]

the label text was hard-coded since it doesn't require translation.

+                           value="{{newPrinter.printerQueue}}">
               </paper-input>
             </div>
           </div>
         </div>
         <div class="search-printer-box" id="searchInProgress" hidden>
           <paper-spinner active></paper-spinner>
           <span class="spinner-comment">$i18n{searchingPrinter}</span>
         </div>
         <div class="search-printer-box printer-not-found"
             id="searchNotFound" hidden>
@@ skipping 181 matching lines @@
     <!-- Manufacturer and Model Dialog -->
     <template is="dom-if" if="[[showManufacturerDialog_]]" restamp>
       <add-printer-manufacturer-model-dialog new-printer="{{newPrinter}}"
           setup-failed="[[setupFailed]]">
       </add-printer-manufacturer-model-dialog>
     </template>
 
   </template>
   <script src="cups_add_printer_dialog.js"></script>
 </dom-module>