From 98ab547140a6cefd6c954389dc9cb02baa37fdaa Mon Sep 17 00:00:00 2001
From: Yury Delendik <ydelendik@mozilla.com>
Date: Thu, 17 Apr 2014 07:32:58 -0500
Subject: [PATCH] Fixes webbrowser.js to avoid undefined callback call

---
 test/webbrowser.js | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/test/webbrowser.js b/test/webbrowser.js
index 24d72a757..8c36432d4 100644
--- a/test/webbrowser.js
+++ b/test/webbrowser.js
@@ -74,18 +74,14 @@ WebBrowser.prototype = {
     try {
       testUtils.removeDirSync(this.tmpDir);
       this.process = null;
-      callback();
+      if (callback) {
+        callback();
+      }
     } catch (e) {
       console.error('Unable to cleanup after the process: ' + e);
       try {
         if (this.process) {
-          var pid = this.process.pid;
-          if (process.platform === 'win32') {
-            // kill does not really work on windows
-            spawn('taskkill', ['-F', '-PID', pid]).on('exit', callback);
-          } else {
-            spawn('kill', ['-s', 'SIGKILL', pid]).on('exit', callback);
-          }
+          this.process.kill('SIGKILL');
         }
       } catch (e) {}
     }