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

chrome/browser/resources/settings/site_settings/cookie_tree_behavior.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 A behavior for managing a tree of cookies.
  */
 
 /** @polymerBehavior */
 var CookieTreeBehaviorImpl = {
@@ skipping 20 matching lines @@
     this.rootCookieNode = new settings.CookieTreeNode(null);
   },
 
   /**
    * Called when the cookie list is ready to be shown.
    * @param {!CookieList} list The cookie list to show.
    * @return {Promise}
    * @private
    */
   loadChildren_: function(list) {
-    var loadChildrenRecurse = function(childList) {
+    var loadChildrenRecurse = childList => {
       var parentId = childList.id;
       var children = childList.children;
       var prefix = '';
       if (parentId !== null) {
         this.rootCookieNode.populateChildNodes(
             parentId, this.rootCookieNode, children);
         prefix = parentId + ', ';
       }
       var promises = [];
       for (var i = 0; i < children.length; i++) {
         var child = children[i];
         if (child.hasChildren) {
           promises.push(this.browserProxy.loadCookieChildren(prefix + child.id)
                             .then(loadChildrenRecurse.bind(this)));
         }
       }
       return Promise.all(promises);
-    }.bind(this);
+    };
 
     // New root being added, clear the list and add the nodes.
     this.sites = [];
     this.rootCookieNode.addChildNodes(this.rootCookieNode, list.children);
-    return loadChildrenRecurse(list).then(function() {
+    return loadChildrenRecurse(list).then(() => {
       this.sites = this.rootCookieNode.getSummaryList();
       return Promise.resolve();
-    }.bind(this));
+    });
   },
 
   /**
    * Loads (or reloads) the whole cookie list.
    * @return {Promise}
    */
   loadCookies: function() {
     return this.browserProxy.reloadCookies().then(
         this.loadChildren_.bind(this));
   },
@@ skipping 13 matching lines @@
    * @return {Promise}
    */
   removeAllCookies: function() {
     return this.browserProxy.removeAllCookies().then(
         this.loadChildren_.bind(this));
   },
 };
 
 /** @polymerBehavior */
 var CookieTreeBehavior = [SiteSettingsBehavior, CookieTreeBehaviorImpl];