MD Settings: Convert all usages of .bind(this) to use ES6 arrow function.

chrome/browser/resources/settings/search_page/search_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-search-page' is the settings page containing search settings.
  */
 Polymer({
   is: 'settings-search-page',
@@ skipping 37 matching lines @@
   browserProxy_: null,
 
   /** @override */
   created: function() {
     this.browserProxy_ = settings.SearchEnginesBrowserProxyImpl.getInstance();
   },
 
   /** @override */
   ready: function() {
     // Omnibox search engine
-    var updateSearchEngines = function(searchEngines) {
+    var updateSearchEngines = searchEngines => {
       this.set('searchEngines_', searchEngines.defaults);
       this.requestHotwordInfoUpdate_();
-    }.bind(this);
+    };
     this.browserProxy_.getSearchEnginesList().then(updateSearchEngines);
     cr.addWebUIListener('search-engines-changed', updateSearchEngines);
 
     // Hotword (OK Google) listener
     cr.addWebUIListener(
         'hotword-info-update', this.hotwordInfoUpdate_.bind(this));
 
     // Google Now cards in the launcher
     cr.addWebUIListener(
         'google-now-availability-changed',
         this.googleNowAvailabilityUpdate_.bind(this));
-    this.browserProxy_.getGoogleNowAvailability().then(function(available) {
+    this.browserProxy_.getGoogleNowAvailability().then(available => {
       this.googleNowAvailabilityUpdate_(available);
-    }.bind(this));
+    });
 
     this.focusConfig_ = new Map();
     if (settings.routes.SEARCH_ENGINES) {
       this.focusConfig_.set(
           settings.routes.SEARCH_ENGINES.path,
           '#subpage-trigger .subpage-arrow');
     }
   },
 
   /** @private */
@@ skipping 18 matching lines @@
    * @private
    */
   onHotwordSearchEnableChange_: function(event) {
     // Do not set the pref directly, allow Chrome to run the setup app instead.
     this.browserProxy_.setHotwordSearchEnabled(
         !!this.hotwordSearchEnablePref_.value);
   },
 
   /** @private */
   requestHotwordInfoUpdate_: function() {
-    this.browserProxy_.getHotwordInfo().then(function(hotwordInfo) {
+    this.browserProxy_.getHotwordInfo().then(hotwordInfo => {
       this.hotwordInfoUpdate_(hotwordInfo);
-    }.bind(this));
+    });
   },
 
   /**
    * @param {!SearchPageHotwordInfo} hotwordInfo
    * @private
    */
   hotwordInfoUpdate_: function(hotwordInfo) {
     this.hotwordInfo_ = hotwordInfo;
     this.hotwordSearchEnablePref_ = {
       key: 'unused',  // required for PrefObject
@@ skipping 61 matching lines @@
 
   /**
    * @param {!chrome.settingsPrivate.PrefObject} pref
    * @return {boolean}
    * @private
    */
   isDefaultSearchEngineEnforced_: function(pref) {
     return pref.enforcement == chrome.settingsPrivate.Enforcement.ENFORCED;
   },
 });