From 571edd85c2bf5c52e4f6d9f9f511cd1ff3ce0246 Mon Sep 17 00:00:00 2001
From: Jim <jsproch@fb.com>
Date: Tue, 6 Oct 2015 14:30:03 -0700
Subject: [PATCH] Revert "Remove dependence on ES5 shams per #4189"

---
 src/isomorphic/classic/element/ReactElement.js             | 6 ++----
 src/renderers/dom/ReactDOM.js                              | 6 +++++-
 src/renderers/dom/client/syntheticEvents/SyntheticEvent.js | 5 +----
 3 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/isomorphic/classic/element/ReactElement.js b/src/isomorphic/classic/element/ReactElement.js
index bad91e5030..39db3d2a6b 100644
--- a/src/isomorphic/classic/element/ReactElement.js
+++ b/src/isomorphic/classic/element/ReactElement.js
@@ -109,10 +109,8 @@ var ReactElement = function(type, key, ref, self, source, owner, props) {
       element._self = self;
       element._source = source;
     }
-    if (Object.freeze) {
-      Object.freeze(element.props);
-      Object.freeze(element);
-    }
+    Object.freeze(element.props);
+    Object.freeze(element);
   }
 
   return element;
diff --git a/src/renderers/dom/ReactDOM.js b/src/renderers/dom/ReactDOM.js
index f9c8e7f76d..f8e030c844 100644
--- a/src/renderers/dom/ReactDOM.js
+++ b/src/renderers/dom/ReactDOM.js
@@ -98,12 +98,16 @@ if (__DEV__) {
       Object.keys,
       String.prototype.split,
       String.prototype.trim,
+
+      // shams
+      Object.create,
+      Object.freeze,
     ];
 
     for (var i = 0; i < expectedFeatures.length; i++) {
       if (!expectedFeatures[i]) {
         console.error(
-          'One or more ES5 shims expected by React are not available: ' +
+          'One or more ES5 shim/shams expected by React are not available: ' +
           'https://fb.me/react-warning-polyfills'
         );
         break;
diff --git a/src/renderers/dom/client/syntheticEvents/SyntheticEvent.js b/src/renderers/dom/client/syntheticEvents/SyntheticEvent.js
index ac111803e0..71d018004b 100644
--- a/src/renderers/dom/client/syntheticEvents/SyntheticEvent.js
+++ b/src/renderers/dom/client/syntheticEvents/SyntheticEvent.js
@@ -175,10 +175,7 @@ SyntheticEvent.Interface = EventInterface;
 SyntheticEvent.augmentClass = function(Class, Interface) {
   var Super = this;
 
-  var E = function () {};
-  E.prototype = Super.prototype;
-  var prototype = new E();
-
+  var prototype = Object.create(Super.prototype);
   assign(prototype, Class.prototype);
   Class.prototype = prototype;
   Class.prototype.constructor = Class;