Allows to show display settings for 1-display of stumpy.

chrome/browser/resources/options/chromeos/display_options.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('options', function() {
   var OptionsPage = options.OptionsPage;
 
   // The scale ratio of the display rectangle to its original size.
   /** @const */ var VISUAL_SCALE = 1 / 10;
 
@@ skipping 1038 matching lines @@
      * @param {boolean} mirroring Whether current mode is mirroring or not.
      * @param {Array} displays The list of the display information.
      * @param {SecondaryDisplayLayout} layout The layout strategy.
      * @param {number} offset The offset of the secondary display.
      * @private
      */
     onDisplayChanged_: function(mirroring, displays, layout, offset) {
       if (!this.visible)
         return;
 
-      if (displays.length < 2 && !mirroring) {
+      var hasExternal = false;
+      for (var i = 0; i < displays.length; i++) {
+        if (!displays[i].isInternal) {
+          hasExternal = true;
+          break;
+        }
+      }
+      if (!hasExternal && !mirroring) {
         OptionsPage.showDefaultPage();
         return;
       }
 
       this.mirroring_ = mirroring;
       this.layout_ = layout;
       this.offset_ = offset;
       this.dirty_ = false;
 
       $('display-options-toggle-mirroring').textContent =
@@ skipping 28 matching lines @@
       mirroring, displays, layout, offset) {
     DisplayOptions.getInstance().onDisplayChanged_(
         mirroring, displays, layout, offset);
   };
 
   // Export
   return {
     DisplayOptions: DisplayOptions
   };
 });