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

chrome/browser/resources/settings/certificate_manager_page/certificate_delete_confirmation_dialog.js

 // Copyright 2016 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 confirmation dialog allowing the user to delete various types
  * of certificates.
  */
 Polymer({
   is: 'settings-certificate-delete-confirmation-dialog',
@@ skipping 21 matching lines @@
 
   /**
    * @private
    * @return {string}
    */
   getTitleText_: function() {
     /**
      * @param {string} localizedMessageId
      * @return {string}
      */
-    var getString = function(localizedMessageId) {
-      return loadTimeData.getStringF(localizedMessageId, this.model.name);
-    }.bind(this);
+    var getString = localizedMessageId =>
+        loadTimeData.getStringF(localizedMessageId, this.model.name);
 
     switch (this.certificateType) {
       case CertificateType.PERSONAL:
         return getString('certificateManagerDeleteUserTitle');
       case CertificateType.SERVER:
         return getString('certificateManagerDeleteServerTitle');
       case CertificateType.CA:
         return getString('certificateManagerDeleteCaTitle');
       case CertificateType.OTHER:
         return getString('certificateManagerDeleteOtherTitle');
@@ skipping 22 matching lines @@
 
   /** @private */
   onCancelTap_: function() {
     /** @type {!CrDialogElement} */ (this.$.dialog).close();
   },
 
   /** @private */
   onOkTap_: function() {
     this.browserProxy_.deleteCertificate(this.model.id)
         .then(
-            function() {
+            () => {
               /** @type {!CrDialogElement} */ (this.$.dialog).close();
-            }.bind(this),
-            /** @param {!CertificatesError} error */
-            function(error) {
+            },
+            error => {
               /** @type {!CrDialogElement} */ (this.$.dialog).close();
               this.fire('certificates-error', {error: error, anchor: null});
-            }.bind(this));
+            });
   },
 });