MD Settings: Internet: Cleanup JS

chrome/browser/resources/settings/internet_page/internet_page.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
  * 'settings-internet-page' is the settings page containing internet
  * settings.
  */
 Polymer({
   is: 'settings-internet-page',
 
   properties: {
-    /** The network type for the known networks subpage. */
-    knownNetworksType: {
-      type: String,
-    },
-
-    /** Whether the 'Add connection' section is expanded. */
-    addConnectionExpanded: {
-      type: Boolean,
-      value: false,
-    },
-
     /**
      * Interface for networkingPrivate calls. May be overriden by tests.
      * @type {NetworkingPrivate}
      */
     networkingPrivate: {
       type: Object,
       value: chrome.networkingPrivate,
     },
+
+    /**
+     * The network type for the known networks subpage.
+     * @private
+     */
+    knownNetworksType_: String,
+
+    /**
+     * Whether the 'Add connection' section is expanded.
+     * @private
+     */
+    addConnectionExpanded_: {
+      type: Boolean,
+      value: false,
+    },
   },
 
   /**
    * @param {!{detail: !CrOnc.NetworkStateProperties}} event
    * @private
    */
   onShowDetail_: function(event) {
     settings.navigateTo(
         settings.Route.NETWORK_DETAIL,
         new URLSearchParams('guid=' + event.detail.GUID));
   },
 
   /**
    * @param {!{detail: {type: string}}} event
    * @private
    */
   onShowKnownNetworks_: function(event) {
-    this.knownNetworksType = event.detail.type;
+    this.knownNetworksType_ = event.detail.type;
     settings.navigateTo(settings.Route.KNOWN_NETWORKS);
   },
 
   /**
    * Event triggered when the 'Add connections' div is tapped.
    * @param {Event} event
    * @private
    */
   onExpandAddConnectionsTap_: function(event) {
     if (event.target.id == 'expandAddConnections')
       return;
-    this.addConnectionExpanded = !this.addConnectionExpanded;
+    this.addConnectionExpanded_ = !this.addConnectionExpanded_;
   },
 
   /*** @private */
   onAddWiFiTap_: function() {
     chrome.send('addNetwork', [CrOnc.Type.WI_FI]);
   },
 
   /*** @private */
   onAddVPNTap_: function() {
     chrome.send('addNetwork', [CrOnc.Type.VPN]);
   },
 });