From 414183e0fd0e365e5f8e891cd6048f4dd1c86262 Mon Sep 17 00:00:00 2001
From: deepak1556 <hop2deep@gmail.com>
Date: Wed, 8 Jun 2016 18:04:03 +0530
Subject: [PATCH] fix dereferencing null pointer

---
 atom/browser/atom_resource_dispatcher_host_delegate.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/atom/browser/atom_resource_dispatcher_host_delegate.cc b/atom/browser/atom_resource_dispatcher_host_delegate.cc
index 59ac258ea13..1115aa049d6 100644
--- a/atom/browser/atom_resource_dispatcher_host_delegate.cc
+++ b/atom/browser/atom_resource_dispatcher_host_delegate.cc
@@ -31,10 +31,13 @@ void HandleExternalProtocolInUI(
   if (!web_contents)
     return;
 
-  GURL escaped_url(net::EscapeExternalHandlerValue(url.spec()));
-  auto callback = base::Bind(&OnOpenExternal, escaped_url);
   auto permission_helper =
       WebContentsPermissionHelper::FromWebContents(web_contents);
+  if (!permission_helper)
+    return;
+
+  GURL escaped_url(net::EscapeExternalHandlerValue(url.spec()));
+  auto callback = base::Bind(&OnOpenExternal, escaped_url);
   permission_helper->RequestOpenExternalPermission(callback, has_user_gesture);
 }