Consistently decorate pref values sent to the settings UI code

chrome/browser/resources/options2/chromeos/proxy_rules_list.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.proxyexceptions', function() {
   /** @const */ var List = cr.ui.List;
   /** @const */ var ListItem = cr.ui.ListItem;
   /** @const */ var ArrayDataModel = cr.ui.ArrayDataModel;
 
   /**
@@ skipping 16 matching lines @@
       // HACK(arv): http://crbug.com/40902
       window.addEventListener('resize', this.redraw.bind(this));
 
       this.addEventListener('click', this.handleClick_);
 
       var self = this;
 
       // Listens to pref changes.
       Preferences.getInstance().addEventListener(this.pref,
           function(event) {
-            self.load_(event.value);
+            self.load_(event.value.value);
           });
     },
 
     createItem: function(exception) {
       return new ProxyExceptionsItem(exception);
     },
 
     /**
      * Adds given exception to model and update backend.
      * @param {Object} exception A exception to be added to exception list.
@@ skipping 82 matching lines @@
       labelException.className = '';
       labelException.textContent = this.exception;
       this.appendChild(labelException);
     }
   };
 
   return {
     ProxyExceptions: ProxyExceptions
   };
 });