$OpenBSD: patch-base_base_switches_h,v 1.9 2021/04/16 18:15:05 robert Exp $

Index: base/base_switches.h
--- base/base_switches.h.orig
+++ base/base_switches.h
@@ -58,7 +58,7 @@ 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[];
 
 // TODO(crbug.com/1176772): Remove kEnableCrashpad and IsCrashpadEnabled() when
