MD Settings: show an extension-controlled-indicator for proxy

chrome/browser/resources/settings/settings_ui/settings_ui.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-ui' implements the UI for the Settings page.
  *
  * Example:
  *
@@ skipping 42 matching lines @@
      */
     pageVisibility_: Object,
 
     /** @private */
     lastSearchQuery_: {
       type: String,
       value: '',
     }
   },
 
+  listeners: {
+    'refresh-pref': 'onRefreshPref_',
+  },
+
   /** @override */
   created: function() {
     settings.initializeRouteFromUrl();
   },
 
   /**
    * @override
    * @suppress {es5Strict} Object literals cannot contain duplicate keys in ES5
    *     strict mode.
    */
@@ skipping 64 matching lines @@
     if (urlSearchQuery != searchField.getValue()) {
       // Setting the search box value without triggering a 'search-changed'
       // event, to prevent an unnecessary duplicate entry in |window.history|.
       searchField.setValue(urlSearchQuery, true /* noEvent */);
     }
 
     this.$.main.searchContents(urlSearchQuery);
   },
 
   /**
+   * @param {!CustomEvent} e
+   * @private
+   */
+  onRefreshPref_: function(e) {
+    var prefName = /** @type {string} */(e.detail);
+    return /** @type {SettingsPrefsElement} */(this.$.prefs).refresh(prefName);
+  },
+
+  /**
    * Handles the 'search-changed' event fired from the toolbar.
    * @param {!Event} e
    * @private
    */
   onSearchChanged_: function(e) {
     // Trim leading whitespace only, to prevent searching for empty string. This
     // still allows the user to search for 'foo bar', while taking a long pause
     // after typing 'foo '.
     var query = e.detail.replace(/^\s+/, '');
     // Prevent duplicate history entries.
@@ skipping 19 matching lines @@
   onMenuButtonTap_: function() {
     this.$$('app-drawer').toggle();
   },
 
   /** @private */
   directionDelegateChanged_: function() {
     this.$$('app-drawer').align = this.directionDelegate.isRtl() ?
         'right' : 'left';
   },
 });