Use device Robot Account to access Cloud Print.

chrome/browser/resources/print_preview/data/destination_store.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';
 
   /**
    * A data store that stores destinations and dispatches events when the data
    * store changes.
@@ skipping 290 matching lines @@
         clearTimeout(this.autoSelectTimeout_);
         this.autoSelectTimeout_ = null;
       }
       if (destination.id == print_preview.Destination.GooglePromotedId.FEDEX &&
           !destination.isTosAccepted) {
         assert(this.cloudPrintInterface_ != null,
                'Selected FedEx Office destination, but Google Cloud Print is ' +
                'not enabled');
         destination.isTosAccepted = true;
         this.cloudPrintInterface_.updatePrinterTosAcceptance(destination.id,
+                                                             destination.origin,
                                                              true);
       }
       this.appState_.persistSelectedDestination(this.selectedDestination_);
       cr.dispatchSimpleEvent(
           this, DestinationStore.EventType.DESTINATION_SELECT);
       if (destination.capabilities == null) {
          if (destination.isLocal) {
           this.nativeLayer_.startGetLocalDestinationCapabilities(
               destination.id);
         } else {
@@ skipping 355 matching lines @@
       return id == this.initialDestinationId_ &&
              origin == this.initialDestinationOrigin_;
     }
   };
 
   // Export
   return {
     DestinationStore: DestinationStore
   };
 });