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

chrome/browser/resources/settings/basic_page/basic_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-basic-page' is the settings page containing the actual settings.
  */
 Polymer({
   is: 'settings-basic-page',
@@ skipping 81 matching lines @@
   },
 
   listeners: {
     'subpage-expand': 'onSubpageExpanded_',
   },
 
   /** @override */
   attached: function() {
     this.currentRoute_ = settings.getCurrentRoute();
 
-    this.addEventListener('chrome-cleanup-dismissed', function(e) {
+    this.addEventListener('chrome-cleanup-dismissed', e => {
       this.showChromeCleanup = false;
-    }.bind(this));
+    });
 
     if (settings.AndroidAppsBrowserProxyImpl) {
       cr.addWebUIListener(
           'android-apps-info-update', this.androidAppsInfoUpdate_.bind(this));
       settings.AndroidAppsBrowserProxyImpl.getInstance()
           .requestAndroidAppsInfo();
     }
   },
 
   /**
@@ skipping 125 matching lines @@
   onSubpageExpanded_: function() {
     this.hasExpandedSection_ = true;
   },
 
   /**
    * Render the advanced page now (don't wait for idle).
    * @private
    */
   advancedToggleExpandedChanged_: function() {
     if (this.advancedToggleExpanded) {
-      this.async(function() {
+      this.async(() => {
         this.$$('#advancedPageTemplate').get();
-      }.bind(this));
+      });
     }
   },
 
   /**
    * @param {boolean} inSearchMode
    * @param {boolean} hasExpandedSection
    * @return {boolean}
    * @private
    */
   showAdvancedToggle_: function(inSearchMode, hasExpandedSection) {
@@ skipping 40 matching lines @@
 
   /**
    * @param {boolean} opened Whether the menu is expanded.
    * @return {string} Icon name.
    * @private
    */
   getArrowIcon_: function(opened) {
     return opened ? 'cr:arrow-drop-up' : 'cr:arrow-drop-down';
   },
 });