Removing 'AllowScopedIO' exception from SecurityKeyAuthHandlerLinux

remoting/host/security_key/security_key_auth_handler_mac.cc

Index: remoting/host/security_key/security_key_auth_handler_mac.cc
diff --git a/remoting/host/security_key/security_key_auth_handler_mac.cc b/remoting/host/security_key/security_key_auth_handler_mac.cc
index ac5a15df0b72f0acbf32cc2413063d552d8725da..5bff3442d7344901f6fe2f4933346a71d942a80a 100644
--- a/remoting/host/security_key/security_key_auth_handler_mac.cc
+++ b/remoting/host/security_key/security_key_auth_handler_mac.cc
@@ -10,7 +10,8 @@ namespace remoting {
 
 std::unique_ptr<SecurityKeyAuthHandler> SecurityKeyAuthHandler::Create(
     ClientSessionDetails* client_session_details,
-    const SendMessageCallback& send_message_callback) {
+    const SendMessageCallback& send_message_callback,
+    scoped_refptr<base::SingleThreadTaskRunner> file_task_runner) {
   return nullptr;
 }