Fix supervised user dialog close regression.

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 Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
 
   // The scale ratio of the display rectangle to its original size.
   /** @const */ var VISUAL_SCALE = 1 / 10;
@@ skipping 180 matching lines @@
                     ['Options_DisplaySetOverscan']);
       }.bind(this);
 
       chrome.send('getDisplayInfo');
     },
 
     /** @override */
     didShowPage: function() {
       var optionTitles = document.getElementsByClassName(
           'selected-display-option-title');
+
       var maxSize = 0;
-      for (var i = 0; i < optionTitles.length; i++)
+      for (var i = 0; i < optionTitles.length; i++) {
         maxSize = Math.max(maxSize, optionTitles[i].clientWidth);
-      for (var i = 0; i < optionTitles.length; i++)
+      }
+
+      for (var i = 0; i < optionTitles.length; i++) {
         optionTitles[i].style.width = maxSize + 'px';
-    },
+      }
 
-    /** @override */
-    onVisibilityChanged_: function() {
-      Page.prototype.onVisibilityChanged_(this);
-      if (this.visible)
-        chrome.send('getDisplayInfo');
+      chrome.send('getDisplayInfo');
     },
 
     /**
      * Mouse move handler for dragging display rectangle.
      * @param {Event} e The mouse move event.
      * @private
      */
     onMouseMove_: function(e) {
       return this.processDragging_(e, {x: e.pageX, y: e.pageY});
     },
@@ skipping 653 matching lines @@
       mirroring, displays, layout, offset) {
     DisplayOptions.getInstance().onDisplayChanged_(
         mirroring, displays, layout, offset);
   };
 
   // Export
   return {
     DisplayOptions: DisplayOptions
   };
 });