dom-ui settings: Don't allow click sub-page closing when an overlay is visibl...

chrome/browser/resources/options/options_page.js

 // Copyright (c) 2010 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() {
   /////////////////////////////////////////////////////////////////////////////
   // OptionsPage class:
 
   /**
    * Base class for options page.
@@ skipping 364 matching lines @@
    * closing subpages and/or stopping event propagation.
    * @return {Event} a mousedown or click event.
    * @private
    */
   OptionsPage.bodyMouseEventHandler_ = function(event) {
     // Do nothing if a subpage isn't showing.
     var topPage = this.getTopmostVisiblePage();
     if (!(topPage && topPage.parentPage))
       return;
 
+    // If an overlay is currently visible, do nothing.
+    if (this.isOverlayVisible_())
+      return;
+
     // If the click was within a subpage, do nothing.
     for (var level = 1; level <= 2; level++) {
       if ($('subpage-sheet-container-' + level).contains(event.target))
         return;
     }
 
     // Close all subpages on click.
     if (event.type == 'click')
       this.closeSubPagesToLevel(0);
 
@@ skipping 175 matching lines @@
       OptionsPage.showOverlay(hash);
     },
   };
 
   // Export
   return {
     OptionsPage: OptionsPage
   };
 
 });