[CUPS] Fix the Printer protocol string that displays in the UI.

chrome/browser/resources/settings/printing_page/cups_printer_details_page.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview 'settings-cups-printer-details-page' is the subpage for
  * viewing the details of a CUPS printer.
  */
 Polymer({
   is: 'settings-cups-printer-details-page',
@@ skipping 30 matching lines @@
 
   /**
    * @param {Event} event
    * @private
    */
   toggleAdvancedExpanded_: function(event) {
     if (event.target.id == 'expandButton')
       return;  // Already handled.
     this.advancedExpanded = !this.advancedExpanded;
   },
+
+  /**
+   * @param {string} printerProtocol
+   * @return {string} The Printer's protocol that displays in UI
+   * @private
+   */
+  getPrinterProtocol_: function(printerProtocol) {
+    if (!printerProtocol)
+      return '';
+    if (printerProtocol == 'ipp')
+      return loadTimeData.getString('printerProtocolIpp');
+    if (printerProtocol == 'ipps')
+      return loadTimeData.getString('printerProtocolIpps');
+    if (printerProtocol == 'http')
+      return loadTimeData.getString('printerProtocolHttp');
+    if (printerProtocol == 'https')
+      return loadTimeData.getString('printerProtocolHttps');
+    if (printerProtocol == 'socket')
+      return loadTimeData.getString('printerProtocolAppSocket');
+    if (printerProtocol == 'lpd')
+      return loadTimeData.getString('printerProtocolLpd');
+    if (printerProtocol == 'usb')
+      return loadTimeData.getString('printerProtocolUsb');
+    assertNotReached('Illegal printer protocol!');
+  },
 });