Bypass vm module use for ChakraNode.

test/test.js

@@ -542,6 +542,9 @@
 
   // Add other realm values from the `vm` module.
   _.attempt(function() {
+    if (process.jsEngine == 'chakra') {
+      return;
+    }
     _.extend(_, require('vm').runInNewContext([
       '(function() {',
       ' var object = {',