From a03dbd2cca16550cc54a8a31c3fb9b1ded938bd3 Mon Sep 17 00:00:00 2001
From: Douglas Reith <douglas@reith.com.au>
Date: Wed, 5 Apr 2017 12:36:22 +0000
Subject: [PATCH] Fixes #22264 - add support for Chrome headless, see also
 Seldaek/monolog#966

---
 src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php b/src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php
index 2636bc3b89..a60a4ec479 100644
--- a/src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php
+++ b/src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php
@@ -41,7 +41,7 @@ class ChromePhpHandler extends BaseChromePhpHandler
             return;
         }
 
-        if (!preg_match('{\b(?:Chrome/\d+(?:\.\d+)*|Firefox/(?:4[3-9]|[5-9]\d|\d{3,})(?:\.\d)*)\b}', $event->getRequest()->headers->get('User-Agent'))) {
+        if (!preg_match('{\b(?:Chrome/\d+(?:\.\d+)*|HeadlessChrome|Firefox/(?:4[3-9]|[5-9]\d|\d{3,})(?:\.\d)*)\b}', $event->getRequest()->headers->get('User-Agent'))) {
             $this->sendHeaders = false;
             $this->headers = array();