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

chrome/browser/resources/settings/site_settings/site_list.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
  * 'site-list' shows a list of Allowed and Blocked sites for a given
  * category.
  */
 Polymer({
@@ skipping 197 matching lines @@
   onAddSiteTap_: function(e) {
     assert(!this.readOnlyList);
     e.preventDefault();
     var dialog = document.createElement('add-site-dialog');
     dialog.category = this.category;
     dialog.contentSetting = this.categorySubtype;
     this.shadowRoot.appendChild(dialog);
 
     dialog.open(this.categorySubtype);
 
-    dialog.addEventListener('close', function() {
+    dialog.addEventListener('close', () => {
       cr.ui.focusWithoutInk(assert(this.$.addSite));
       dialog.remove();
-    }.bind(this));
+    });
   },
 
   /**
    * Populate the sites list for display.
    * @private
    */
   populateList_: function() {
-    this.browserProxy_.getExceptionList(this.category)
-        .then(function(exceptionList) {
-          this.processExceptions_([exceptionList]);
-          this.closeActionMenu_();
-        }.bind(this));
+    this.browserProxy_.getExceptionList(this.category).then(exceptionList => {
+      this.processExceptions_([exceptionList]);
+      this.closeActionMenu_();
+    });
   },
 
   /**
    * Process the exception list returned from the native layer.
    * @param {!Array<!Array<RawSiteException>>} data List of sites (exceptions)
    *     to process.
    * @private
    */
   processExceptions_: function(data) {
     var sites = /** @type {!Array<RawSiteException>} */ ([]);
@@ skipping 186 matching lines @@
   /** @private */
   closeActionMenu_: function() {
     this.actionMenuSite_ = null;
     this.activeDialogAnchor_ = null;
     var actionMenu = /** @type {!CrActionMenuElement} */ (
         this.$$('dialog[is=cr-action-menu]'));
     if (actionMenu.open)
       actionMenu.close();
   },
 });