From 2fe2cd5337f063a0efe74b426ec3987f1e45fb15 Mon Sep 17 00:00:00 2001
From: Christoph Pojer <cpojer@fb.com>
Date: Wed, 20 Nov 2013 14:04:01 -0800
Subject: [PATCH] Ensure ReactPerf always uses a string as a URL

---
 src/test/ReactPerf.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/test/ReactPerf.js b/src/test/ReactPerf.js
index 75f9aeff2f..beb60e1573 100644
--- a/src/test/ReactPerf.js
+++ b/src/test/ReactPerf.js
@@ -68,7 +68,7 @@ var ReactPerf = {
 
 if (__DEV__) {
   var ExecutionEnvironment = require('ExecutionEnvironment');
-  var URL = ExecutionEnvironment.canUseDOM ? window.location.href : '';
+  var URL = (ExecutionEnvironment.canUseDOM && window.location.href) || '';
   ReactPerf.enableMeasure = ReactPerf.enableMeasure ||
     !!URL.match(/[?&]react_perf\b/);
 }