MD Settings: CrOS: Internet: IPConfig: Set correct property

chrome/browser/resources/settings/internet_page/network_ip_config.js

 // Copyright 2015 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 Polymer element for displaying the IP Config properties for
  * a network state. TODO(stevenjb): Allow editing of static IP configurations
  * when 'editable' is true.
  */
 Polymer({
@@ skipping 184 matching lines @@
    * @param {!{detail: {field: string, value: string}}} event The
    *     network-property-list change event.
    * @private
    */
   onIPChange_: function(event) {
     if (!this.ipConfig_)
       return;
     var field = event.detail.field;
     var value = event.detail.value;
     // Note: |field| includes the 'ipv4.' prefix.
-    this.set('ipConfig.' + field, value);
+    this.set('ipConfig_.' + field, value);
     this.fire('ip-change', {
       field: 'StaticIPConfig',
       value: this.getIPConfigProperties_(this.ipConfig_.ipv4)
     });
   },
 });