Use GUID instead of servicePath in network settings

chrome/browser/resources/options/chromeos/onc_data.js

 // Copyright 2014 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.
 
 /**
  * @fileoverview ONC Data support class. Wraps a dictionary object containing
  * ONC managed or unmanaged dictionaries. Supports nested dictionaries,
  * e.g. data.getManagedProperty('VPN.Type').
  */
 
 cr.exportPath('cr.onc');
 
 cr.define('cr.onc', function() {
   'use strict';
 
   /**
    * @constructor
    */
   function OncData(data) {
     this.data_ = data;
   }
 
   OncData.prototype = {
+    /** @return {string} The GUID of the network. */
+    guid: function() { return this.data_['GUID']; },
 
     /**
      * Returns either a managed property dictionary or an unmanaged value.
      * @param {string} key The property key.
      * @return {?} The property value or dictionary if it exists, otherwise
      *     undefined.
      */
     getManagedProperty: function(key) {
       var data = this.data_;
       while (true) {
@@ skipping 150 matching lines @@
      */
     getData: function() {
       return this.data_;
     }
   };
 
   return {
     OncData: OncData
   };
 });