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

chrome/browser/resources/settings/about_page/detailed_build_info.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 'settings-detailed-build-info' contains detailed build
  * information for ChromeOS.
  */
 
 Polymer({
@@ skipping 13 matching lines @@
 
     /** @private */
     canChangeChannel_: Boolean,
   },
 
   /** @override */
   ready: function() {
     var browserProxy = settings.AboutPageBrowserProxyImpl.getInstance();
     browserProxy.pageReady();
 
-    browserProxy.getVersionInfo().then(function(versionInfo) {
+    browserProxy.getVersionInfo().then(versionInfo => {
       this.versionInfo_ = versionInfo;
-    }.bind(this));
+    });
 
     this.updateChannelInfo_();
   },
 
   /** @private */
   updateChannelInfo_: function() {
     var browserProxy = settings.AboutPageBrowserProxyImpl.getInstance();
-    browserProxy.getChannelInfo().then(function(info) {
+    browserProxy.getChannelInfo().then(info => {
       // Display the target channel for the 'Currently on' message.
       this.currentlyOnChannelText_ = this.i18n(
           'aboutCurrentlyOnChannel',
           this.i18n(settings.browserChannelToI18nId(info.targetChannel)));
       this.canChangeChannel_ = info.canChangeChannel;
-    }.bind(this));
+    });
   },
 
   /**
    * @param {string} version
    * @return {boolean}
    * @private
    */
   shouldShowVersion_: function(version) {
     return version.length > 0;
   },
@@ skipping 31 matching lines @@
     this.showChannelSwitcherDialog_ = true;
   },
 
   /** @private */
   onChannelSwitcherDialogClosed_: function() {
     this.showChannelSwitcherDialog_ = false;
     cr.ui.focusWithoutInk(assert(this.$$('paper-button')));
     this.updateChannelInfo_();
   },
 });