Use ES6 style class

atom/browser/api/lib/auto-updater/auto-updater-win.js

@@ -1,25 +1,25 @@
+'use strict';
+
 const app = require('electron').app;
 const EventEmitter = require('events').EventEmitter;
 const url = require('url');
 const squirrelUpdate = require('./squirrel-update-win');
-const util = require('util');
 
-function AutoUpdater() {
-  AutoUpdater.super_.call(this);
-}
+class AutoUpdater extends EventEmitter {
+  constructor() {
+    super();
+  }
 
-util.inherits(AutoUpdater, EventEmitter);
-
-AutoUpdater.prototype.quitAndInstall = function() {
+  quitAndInstall() {
     squirrelUpdate.processStart();
     return app.quit();
-};
+  }
 
-AutoUpdater.prototype.setFeedURL = function(updateURL) {
+  setFeedURL(updateURL) {
     return this.updateURL = updateURL;
-};
+  }
 
-AutoUpdater.prototype.checkForUpdates = function() {
+  checkForUpdates() {
     if (!this.updateURL) {
       return this.emitError('Update URL is not set');
     }
@@ -52,12 +52,13 @@ AutoUpdater.prototype.checkForUpdates = function() {
         });
       };
     })(this));
-};
+  }
 
-// Private: Emit both error object and message, this is to keep compatibility
-// with Old APIs.
-AutoUpdater.prototype.emitError = function(message) {
+  // Private: Emit both error object and message, this is to keep compatibility
+  // with Old APIs.
+  emitError(message) {
     return this.emit('error', new Error(message), message);
-};
+  }
+}
 
 module.exports = new AutoUpdater;