Assign setTimeout to itself to avoid leak detection.

test/test.js

@@ -233,6 +233,9 @@
   // Leak to avoid sporadic `noglobals` fails on Edge in Sauce Labs.
   root.msWDfn = undefined;
 
+  // Assign `setTimeout` to itself to avoid being flagged as a leak.
+  setProperty(root, 'setTimeout', setTimeout);
+
   // Exit early if going to run tests in a PhantomJS web page.
   if (phantom && isModularize) {
     var page = require('webpage').create();