backport chrome fix to 4.5

diff --git a/lib/backbone-x/source/model_mixin.js b/lib/backbone-x/source/model_mixin.js
index b877b73..dd91679 100644 (file)
--- a/lib/backbone-x/source/model_mixin.js
+++ b/lib/backbone-x/source/model_mixin.js
@@ -5,6 +5,8 @@
 (function () {
   'use strict';
 
+  Object.observe = undefined;
+
   /**
     Abstract check for attribute level privilege access.