[CUPS] Implement the local CUPS printer setup waiting UI.

chrome/browser/resources/print_preview/search/destination_list.js

 // Copyright (c) 2012 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.
 
 cr.define('print_preview', function() {
   'use strict';
 
   /**
    * Component that displays a list of destinations with a heading, action link,
    * and "Show All..." button. An event is dispatched when the action link is
@@ skipping 207 matching lines @@
       this.renderDestinations_();
     },
 
     /** @param {RegExp} query Query to update the filter with. */
     updateSearchQuery: function(query) {
       this.query_ = query;
       this.renderDestinations_();
     },
 
     /**
+     * @param {string} destinationId The ID of the destination.
+     * @return {?print_preview.DestinationListItem} The found destination list
+     *     item or null if not found.
+     */
+    getDestinationItem: function(destinationId) {
+      return this.listItems_.find(function(listItem) {
+        return listItem.destination.id == destinationId;
+      });

[dpapad, 2017/03/30 20:56:23]

find() returns undefined, if nothing is found, see documentation at [1]. The
comment above is not accurate. 

return this.listItems_.find(function(listItem) {
  return listItem.destination.id == destinationId;
}) || null;

[1]
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Obje...

[xdai1, 2017/03/30 23:18:43]

Thanks. Done.

+    },
+
+    /**
      * @param {string} text Text to set the action link to.
      * @protected
      */
     setActionLinkTextInternal: function(text) {
       this.actionLinkLabel_ = text;
       this.getChildElement('.action-link').textContent = text;
     },
 
     /**
      * Sets the short list size without constraints.
@@ skipping 117 matching lines @@
       cr.dispatchSimpleEvent(this,
                              DestinationList.EventType.ACTION_LINK_ACTIVATED);
     }
   };
 
   // Export
   return {
     DestinationList: DestinationList
   };
 });