Use device Robot Account to access Cloud Print.

chrome/browser/resources/print_preview/search/destination_search.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 used for searching for a print destination.
    * This is a modal dialog that allows the user to search and select a
@@ skipping 266 matching lines @@
      * @private
      */
     renderDestinations_: function() {
       var recentDestinations = [];
       var localDestinations = [];
       var cloudDestinations = [];
       this.destinationStore_.destinations.forEach(function(destination) {
         if (destination.isRecent) {
           recentDestinations.push(destination);
         }
-        if (destination.isLocal) {
+        if (destination.isLocal ||
+            destination.origin == print_preview.Destination.Origin.DEVICE) {
           localDestinations.push(destination);
         } else {
           cloudDestinations.push(destination);
         }
       });
       this.recentList_.updateDestinations(recentDestinations);
       this.localList_.updateDestinations(localDestinations);
       this.cloudList_.updateDestinations(cloudDestinations);
     },
 
@@ skipping 197 matching lines @@
     onWindowResize_: function() {
       this.reflowLists_();
     }
   };
 
   // Export
   return {
     DestinationSearch: DestinationSearch
   };
 });