Fix duplex defaults.

chrome/browser/resources/print_preview/data/print_ticket_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';
 
   // TODO(rltoscano): Maybe clear print ticket when destination changes. Or
   // better yet, carry over any print ticket state that is possible. I.e. if
   // destination changes, the new destination might not support duplex anymore,
@@ skipping 616 matching lines @@
      * Called when the capabilities of the selected destination are ready.
      * @private
      */
     onSelectedDestinationCapabilitiesReady_: function() {
       var caps = this.destinationStore_.selectedDestination.capabilities;
       var isFirstUpdate = this.capabilitiesHolder_.get() == null;
       this.capabilitiesHolder_.set(caps);
       if (isFirstUpdate) {
         cr.dispatchSimpleEvent(this, PrintTicketStore.EventType.INITIALIZE);
       } else {
+        // Reset user selection for certain ticket items.
+        this.duplex_.updateValue(null);
         this.customMargins_.updateValue(null);
+

[Albert Bodenhamer, 2012/08/08 00:01:51]

Did you mean to add the blank line?

[Robert Toscano, 2012/08/08 00:05:48]

Yea to separate it from the next step, which is unrelated.

         if (this.marginsType_.getValue() ==
             print_preview.ticket_items.MarginsType.Value.CUSTOM) {
           this.marginsType_.updateValue(
               print_preview.ticket_items.MarginsType.Value.DEFAULT);
         }
         cr.dispatchSimpleEvent(
             this, PrintTicketStore.EventType.CAPABILITIES_CHANGE);
       }
     }
   };
 
   // Export
   return {
     PrintTicketStore: PrintTicketStore
   };
 });