MD Settings: Internet: Fix IP config visibility

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 24 matching lines @@
      */
     automatic_: {
       type: Boolean,
       value: true,
       observer: 'automaticChanged_',
     },
 
     /**
      * The currently visible IP Config property dictionary. The 'RoutingPrefix'
      * property is a human-readable mask instead of a prefix length.
-     * @private {!{
+     * @private {?{
      *   ipv4: !CrOnc.IPConfigUIProperties,
      *   ipv6: !CrOnc.IPConfigUIProperties
-     * }|undefined}
+     * }}
      */
-    ipConfig_: Object,
+    ipConfig_: {
+      type: Object,
+      value: null,
+    },
 
     /**
      * Array of properties to pass to the property list.
      * @private {!Array<string>}
      */
     ipConfigFields_: {
       type: Array,
       value: function() {
         return [
           'ipv4.IPAddress',
@@ skipping 103 matching lines @@
    */
   showIPEditFields_: function() {
     return this.editable && !this.automatic_;
   },
 
   /**
    * @return {Object} An object with the edit type for each editable field.
    * @private
    */
   getIPEditFields_: function() {
-    if (!this.editable || this.automatic__)
+    if (!this.editable || this.automatic_)
       return {};
     return {
       'ipv4.IPAddress': 'String',
       'ipv4.RoutingPrefix': 'String',
       'ipv4.Gateway': 'String'
     };
   },
 
   /**
    * Event triggered when the network property list changes.
    * @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 will also set IPAddressConfigType to STATIC.
     this.fire('ip-change', {
       field: 'StaticIPConfig',
       value: this.getIPConfigProperties_(this.ipConfig_.ipv4)
     });
   },
 });