From 45b9f15b874068f2e8d6c8789602e697942c0f40 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Mu=C3=B1oz?= <im.mmun@gmail.com>
Date: Wed, 21 Feb 2018 00:02:39 -0500
Subject: [PATCH] Convert Descriptor and Alias to native classes

---
 packages/ember-metal/lib/mixin.js      | 10 +++++-----
 packages/ember-metal/lib/properties.js |  6 ++++--
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/packages/ember-metal/lib/mixin.js b/packages/ember-metal/lib/mixin.js
index 5a719b9a04e..f1ee9408c8a 100644
--- a/packages/ember-metal/lib/mixin.js
+++ b/packages/ember-metal/lib/mixin.js
@@ -656,13 +656,13 @@ export function required() {
   return REQUIRED;
 }
 
-function Alias(methodName) {
-  this.isDescriptor = true;
-  this.methodName = methodName;
+class Alias extends Descriptor {
+  constructor(methodName) {
+    super();
+    this.methodName = methodName;
+  }
 }
 
-Alias.prototype = new Descriptor();
-
 /**
   Makes a method available via an additional name.
 
diff --git a/packages/ember-metal/lib/properties.js b/packages/ember-metal/lib/properties.js
index abb7b6882f7..e246af8059a 100644
--- a/packages/ember-metal/lib/properties.js
+++ b/packages/ember-metal/lib/properties.js
@@ -19,8 +19,10 @@ import { peekCacheFor } from './computed';
   @class Descriptor
   @private
 */
-export function Descriptor() {
-  this.isDescriptor = true;
+export class Descriptor {
+  constructor() {
+    this.isDescriptor = true;
+  }
 }
 
 // ..........................................................