Settings: manage location.hash explicitly on a Page.

chrome/browser/resources/options/content_settings_exceptions_area.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.contentSettings', function() {
   /** @const */ var ControlledSettingIndicator =
                     options.ControlledSettingIndicator;
   /** @const */ var InlineEditableItemList = options.InlineEditableItemList;
   /** @const */ var InlineEditableItem = options.InlineEditableItem;
   /** @const */ var ArrayDataModel = cr.ui.ArrayDataModel;
@@ skipping 640 matching lines @@
 
       $('exception-behavior-column').hidden = type == 'zoomlevels';
       $('exception-zoom-column').hidden = type != 'zoomlevels';
     },
 
     /**
      * Called after the page has been shown. Show the content type for the
      * location's hash.
      */
     didShowPage: function() {
-      var hash = location.hash;
-      if (hash)
-        this.showList(hash.slice(1));
+      if (this.hash)
+        this.showList(this.hash.slice(1));
     },
   };
 
   /**
    * Called when the last incognito window is closed.
    */
   ContentSettingsExceptionsArea.OTRProfileDestroyed = function() {
     this.hideOTRLists(true);
   };
 
@@ skipping 11 matching lines @@
     }
   };
 
   return {
     ExceptionsListItem: ExceptionsListItem,
     ExceptionsAddRowListItem: ExceptionsAddRowListItem,
     ExceptionsList: ExceptionsList,
     ContentSettingsExceptionsArea: ContentSettingsExceptionsArea,
   };
 });