add_thread_local_to_x_error_trap_cc.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jeremy Rose <nornagon@nornagon.net>
Date: Tue, 27 Jul 2021 10:32:54 -0700
Subject: add thread_local to x_error_trap.cc

Per https://bugs.chromium.org/p/chromium/issues/detail?id=781618#c6.

To fix this DCHECK firing: https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/modules/desktop_capture/linux/x_error_trap.cc;l=35;drc=25ab3228f3e473f2226f219531ec617d2daa175e

diff --git a/modules/desktop_capture/linux/x_error_trap.cc b/modules/desktop_capture/linux/x_error_trap.cc
index 13233d827470d9d42be0333c3080e3d107f86fd5..62efb5b5b5194fc8961a27fe2a1efcd77e385d08 100644
--- a/modules/desktop_capture/linux/x_error_trap.cc
+++ b/modules/desktop_capture/linux/x_error_trap.cc
@@ -19,8 +19,8 @@ namespace webrtc {
 namespace {
 
 // TODO(sergeyu): This code is not thread safe. Fix it. Bug 2202.
-static bool g_xserver_error_trap_enabled = false;
-static int g_last_xserver_error_code = 0;
+static thread_local bool g_xserver_error_trap_enabled = false;
+static thread_local int g_last_xserver_error_code = 0;
 
 int XServerErrorHandler(Display* display, XErrorEvent* error_event) {
   RTC_DCHECK(g_xserver_error_trap_enabled);