Add network proxy input to md-settings internet details

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 45 matching lines @@
     /**
      * Array of properties to pass to the property list.
      */
     ipConfigFields_: {
       type: Array,
       value: function() {
         return [
           'ipv4.IPAddress',
           'ipv4.RoutingPrefix',
           'ipv4.Gateway',
-          'ipv6.IPAddress'
+          'ipv6.IPAddress',
+          'ipv4.WebProxyAutoDiscoveryUrl'
         ];
       },
       readOnly: true
     },
   },
 
   /**
    * Saved static IP configuration properties when switching to 'automatic'.
    * @type {?CrOnc.IPConfigUIProperties}
    */
@@ skipping 121 matching lines @@
     var value = event.detail.value;
     console.debug('IP.onIPChanged: ' + field + ' -> ' + value);
     // Note: |field| includes the 'ipv4.' prefix.
     this.set('ipConfig.' + field, value);
     this.fire('changed', {
       field: 'StaticIPConfig',
       value: this.getIPConfigProperties_(this.ipConfig.ipv4)
     });
   },
 });