Begins preview generation as soon as initial state is loaded. Doesn't wait for print destination to…

chrome/browser/resources/print_preview/native_layer.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';
 
   /**
    * An interface to the native Chromium printing system layer.
    * @constructor
@@ skipping 164 matching lines @@
         // preview, they still need to be included.
         'duplex': printTicketStore.duplex.getValue() ?
             NativeLayer.DuplexMode.LONG_EDGE : NativeLayer.DuplexMode.SIMPLEX,
         'copies': printTicketStore.copies.getValueAsNumber(),
         'collate': printTicketStore.collate.getValue(),
         'shouldPrintBackgrounds': printTicketStore.cssBackground.getValue(),
         'shouldPrintSelectionOnly': printTicketStore.selectionOnly.getValue()
       };
 
       // Set 'cloudPrintID' only if the destination is not local.
-      if (!destination.isLocal) {
+      if (destination && !destination.isLocal) {
         ticket['cloudPrintID'] = destination.id;
       }
 
       if (printTicketStore.hasMarginsCapability() &&
           printTicketStore.getMarginsType() ==
               print_preview.ticket_items.MarginsType.Value.CUSTOM) {
         var customMargins = printTicketStore.getCustomMargins();
         var orientationEnum =
             print_preview.ticket_items.CustomMargins.Orientation;
         ticket['marginsCustom'] = {
@@ skipping 541 matching lines @@
       return this.serializedAppStateStr_;
     }
   };
 
   // Export
   return {
     NativeInitialSettings: NativeInitialSettings,
     NativeLayer: NativeLayer
   };
 });