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

chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.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-clear-browsing-data-dialog' allows the user to delete
  * browsing data that has been cached by Chromium.
  */
 Polymer({
   is: 'settings-clear-browsing-data-dialog',
@@ skipping 87 matching lines @@
     this.$.clearFrom.menuOptions = this.clearFromOptions_;
     this.addWebUIListener('update-footer', this.updateFooter_.bind(this));
     this.addWebUIListener(
         'update-counter-text', this.updateCounterText_.bind(this));
   },
 
   /** @override */
   attached: function() {
     this.browserProxy_ =
         settings.ClearBrowsingDataBrowserProxyImpl.getInstance();
-    this.browserProxy_.initialize().then(function() {
+    this.browserProxy_.initialize().then(() => {
       this.$.clearBrowsingDataDialog.showModal();
-    }.bind(this));
+    });
 
     if (this.importantSitesFlagEnabled_) {
-      this.browserProxy_.getImportantSites().then(function(sites) {
+      this.browserProxy_.getImportantSites().then(sites => {
         this.importantSites_ = sites;
-      }.bind(this));
+      });
     }
   },
 
   /**
    * Updates the footer to show only those sentences that are relevant to this
    * user.
    * @param {boolean} syncing Whether the user is syncing data.
    * @param {boolean} otherFormsOfBrowsingHistory Whether the user has other
    *     forms of browsing history in their account.
    * @private
@@ skipping 64 matching lines @@
   },
 
   /**
    * Clears browsing data and maybe shows a history notice.
    * @private
    */
   clearBrowsingData_: function() {
     this.clearingInProgress_ = true;
 
     this.browserProxy_.clearBrowsingData(this.importantSites_)
-        .then(
-            /**
-             * @param {boolean} shouldShowNotice Whether we should show the
-             * notice about other forms of browsing history before closing the
-             * dialog.
-             */
-            function(shouldShowNotice) {
-              this.clearingInProgress_ = false;
-              this.showHistoryDeletionDialog_ = shouldShowNotice;
-              if (!shouldShowNotice)
-                this.closeDialogs_();
-            }.bind(this));
+        .then(shouldShowNotice => {
+          this.clearingInProgress_ = false;
+          this.showHistoryDeletionDialog_ = shouldShowNotice;
+          if (!shouldShowNotice)
+            this.closeDialogs_();
+        });
   },
 
   /**
    * Closes the clear browsing data or important site dialog if they are open.
    * @private
    */
   closeDialogs_: function() {
     if (this.$.clearBrowsingDataDialog.open)
       this.$.clearBrowsingDataDialog.close();
     if (this.showImportantSitesDialog_)
@@ skipping 20 matching lines @@
 
   /**
    * Handles the closing of the notice about other forms of browsing history.
    * @private
    */
   onHistoryDeletionDialogClose_: function() {
     this.showHistoryDeletionDialog_ = false;
     this.closeDialogs_();
   },
 });