$OpenBSD: patch-base_base_switches_h,v 1.4 2021/04/01 10:24:43 robert Exp $

Index: base/base_switches.h
--- base/base_switches.h.orig
+++ base/base_switches.h
@@ -55,7 +55,7 @@ extern const char kEnableIdleTracing[];
 extern const char kForceFieldTrialParams[];
 #endif
 
-#if defined(OS_LINUX) || defined(OS_CHROMEOS)
+#if defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_BSD)
 extern const char kEnableThreadInstructionCount[];
 #endif
 
