Use device Robot Account to access Cloud Print.

chrome/browser/resources/print_preview/data/cloud_parsers.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('cloudprint', function() {
   'use strict';
 
   /** Namespace which contains a method to parse cloud destinations directly. */
   function CloudDestinationParser() {};
 
@@ skipping 61 matching lines @@
         json[CloudDestinationParser.Field_.CONNECTION_STATUS] ||
         print_preview.Destination.ConnectionStatus.UNKNOWN;
     var optionalParams = {
       tags: tags,
       isOwned: arrayContains(tags, CloudDestinationParser.OWNED_TAG_),
       lastAccessTime: parseInt(
           json[CloudDestinationParser.Field_.LAST_ACCESS], 10) || Date.now(),
       isTosAccepted: (id == print_preview.Destination.GooglePromotedId.FEDEX) ?
           json[CloudDestinationParser.Field_.IS_TOS_ACCEPTED] : null
     };
+
     var cloudDest = new print_preview.Destination(
         id,
-        CloudDestinationParser.parseType_(
-            json[CloudDestinationParser.Field_.TYPE]),
+        print_preview.Destination.Type.LOCAL /*CloudDestinationParser.parseType_(
+            json[CloudDestinationParser.Field_.TYPE])*/,
         origin,
         json[CloudDestinationParser.Field_.DISPLAY_NAME],
         arrayContains(tags, CloudDestinationParser.RECENT_TAG_) /*isRecent*/,
         connectionStatus,
         optionalParams);
     if (json.hasOwnProperty(CloudDestinationParser.Field_.CAPABILITIES)) {
       cloudDest.capabilities = /*@type {!print_preview.Cdd}*/ (
           json[CloudDestinationParser.Field_.CAPABILITIES]);
     }
     return cloudDest;
@@ skipping 15 matching lines @@
     } else {
       return print_preview.Destination.Type.GOOGLE;
     }
   };
 
   // Export
   return {
     CloudDestinationParser: CloudDestinationParser
   };
 });