Index: chrome/browser/task_manager/sampling/task_group_sampler.h
--- chrome/browser/task_manager/sampling/task_group_sampler.h.orig
+++ chrome/browser/task_manager/sampling/task_group_sampler.h
@@ -33,7 +33,7 @@ class TaskGroupSampler : public base::RefCountedThread
   using OnSwappedMemRefreshCallback =
       base::RepeatingCallback<void(base::ByteCount)>;
   using OnIdleWakeupsCallback = base::RepeatingCallback<void(int)>;
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC)
+#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_BSD)
   using OnOpenFdCountCallback = base::RepeatingCallback<void(int)>;
 #endif  // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC)
   using OnProcessPriorityCallback =
@@ -45,7 +45,7 @@ class TaskGroupSampler : public base::RefCountedThread
       const OnCpuRefreshCallback& on_cpu_refresh,
       const OnSwappedMemRefreshCallback& on_memory_refresh,
       const OnIdleWakeupsCallback& on_idle_wakeups,
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC)
+#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_BSD)
       const OnOpenFdCountCallback& on_open_fd_count,
 #endif  // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC)
       const OnProcessPriorityCallback& on_process_priority);
@@ -65,7 +65,7 @@ class TaskGroupSampler : public base::RefCountedThread
   double RefreshCpuUsage();
   base::ByteCount RefreshSwappedMem();
   int RefreshIdleWakeupsPerSecond();
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC)
+#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_BSD)
   int RefreshOpenFdCount();
 #endif  // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC)
   base::Process::Priority RefreshProcessPriority();
@@ -89,7 +89,7 @@ class TaskGroupSampler : public base::RefCountedThread
   const OnCpuRefreshCallback on_cpu_refresh_callback_;
   const OnSwappedMemRefreshCallback on_swapped_mem_refresh_callback_;
   const OnIdleWakeupsCallback on_idle_wakeups_callback_;
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC)
+#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_BSD)
   const OnOpenFdCountCallback on_open_fd_count_callback_;
 #endif  // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_MAC)
   const OnProcessPriorityCallback on_process_priority_callback_;
