Print Preview: Handle printer media without name fields.

chrome/browser/resources/print_preview/data/destination_store.js

Index: chrome/browser/resources/print_preview/data/destination_store.js
diff --git a/chrome/browser/resources/print_preview/data/destination_store.js b/chrome/browser/resources/print_preview/data/destination_store.js
index 54beb18a138122d9c7aa43aca29fb276c3af5db2..a96778fcea849646b4df90b85660bf85ce4884fd 100644
--- a/chrome/browser/resources/print_preview/data/destination_store.js
+++ b/chrome/browser/resources/print_preview/data/destination_store.js
@@ -564,7 +564,7 @@ cr.define('print_preview', function() {
     var categoryStandardMisc = [];
     var categoryCustom = [];
     for (var i = 0, media; media = mediaSize.option[i]; i++) {
-      var name = media.name;
+      var name = media.name || 'CUSTOM';
       var category;
       if (name.startsWith('NA_')) {
         category = categoryStandardNA;