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

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

Index: chrome/browser/resources/print_preview/search/destination_list.js
diff --git a/chrome/browser/resources/print_preview/search/destination_list.js b/chrome/browser/resources/print_preview/search/destination_list.js
index 351d31184980cbe76ca4808d869d0e1ec89238c0..89b8163ea99404e26e3834e409707154b1435a90 100644
--- a/chrome/browser/resources/print_preview/search/destination_list.js
+++ b/chrome/browser/resources/print_preview/search/destination_list.js
@@ -225,6 +225,17 @@ cr.define('print_preview', function() {
     },
 
     /**
+     * @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;
+      }) || null;
+    },
+
+    /**
      * @param {string} text Text to set the action link to.
      * @protected
      */