--- base/process/process_metrics.h.orig	2026-01-07 00:52:53 UTC
+++ base/process/process_metrics.h
@@ -41,7 +41,7 @@
 #endif
 
 #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \
-    BUILDFLAG(IS_AIX)
+    BUILDFLAG(IS_AIX) || BUILDFLAG(IS_BSD)
 #include <string>
 #include <utility>
 #include <vector>
@@ -51,7 +51,7 @@ namespace base {
 
 namespace base {
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
+#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_BSD)
 // Minor and major page fault counts since the process creation.
 // Both counts are process-wide, and exclude child processes.
 //
@@ -89,7 +89,7 @@ struct ProcessMemoryInfo {
 #endif  // BUILDFLAG(IS_APPLE)
 
 #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \
-    BUILDFLAG(IS_FUCHSIA)
+    BUILDFLAG(IS_FUCHSIA) || BUILDFLAG(IS_BSD)
   uint64_t rss_anon_bytes = 0;
   uint64_t vm_swap_bytes = 0;
 #endif  // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) ||
@@ -181,7 +181,7 @@ class BASE_EXPORT ProcessMetrics {
   base::expected<TimeDelta, ProcessCPUUsageError> GetCumulativeCPUUsage();
 
 #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \
-    BUILDFLAG(IS_AIX)
+    BUILDFLAG(IS_AIX) || BUILDFLAG(IS_BSD)
   // Emits the cumulative CPU usage for all currently active threads since they
   // were started into the output parameter (replacing its current contents).
   // Threads that have already terminated will not be reported. Thus, the sum of
@@ -226,7 +226,7 @@ class BASE_EXPORT ProcessMetrics {
   int GetOpenFdSoftLimit() const;
 #endif  // BUILDFLAG(IS_POSIX)
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
+#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_BSD)
   // Minor and major page fault count as reported by /proc/[pid]/stat.
   // Returns true for success.
   bool GetPageFaultCounts(PageFaultCounts* counts) const;
@@ -244,7 +244,7 @@ class BASE_EXPORT ProcessMetrics {
 #endif  // !BUILDFLAG(IS_MAC)
 
 #if BUILDFLAG(IS_APPLE) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \
-    BUILDFLAG(IS_AIX)
+    BUILDFLAG(IS_AIX) || BUILDFLAG(IS_BSD)
   int CalculateIdleWakeupsPerSecond(uint64_t absolute_idle_wakeups);
 #endif
 #if BUILDFLAG(IS_APPLE)
@@ -266,12 +266,12 @@ class BASE_EXPORT ProcessMetrics {
   // Used to store the previous times and CPU usage counts so we can
   // compute the CPU usage between calls.
   TimeTicks last_cpu_time_;
-#if !BUILDFLAG(IS_FREEBSD) || !BUILDFLAG(IS_POSIX)
+#if BUILDFLAG(IS_POSIX)
   TimeDelta last_cumulative_cpu_;
 #endif
 
 #if BUILDFLAG(IS_APPLE) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \
-    BUILDFLAG(IS_AIX)
+    BUILDFLAG(IS_AIX) || BUILDFLAG(IS_BSD)
   // Same thing for idle wakeups.
   TimeTicks last_idle_wakeups_time_;
   uint64_t last_absolute_idle_wakeups_;
@@ -312,7 +312,7 @@ BASE_EXPORT void IncreaseFdLimitTo(unsigned int max_de
 
 #if BUILDFLAG(IS_WIN) || BUILDFLAG(IS_APPLE) || BUILDFLAG(IS_LINUX) ||      \
     BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_AIX) || \
-    BUILDFLAG(IS_FUCHSIA)
+    BUILDFLAG(IS_FUCHSIA) || BUILDFLAG(IS_BSD)
 // Data about system-wide memory consumption. Available on Windows, Mac, Linux,
 // Android and Chrome OS.
 //
@@ -349,7 +349,7 @@ struct BASE_EXPORT SystemMemoryInfo {
 #endif
 
 #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \
-    BUILDFLAG(IS_AIX)
+    BUILDFLAG(IS_AIX) || BUILDFLAG(IS_BSD)
   // This provides an estimate of available memory as described here:
   // https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773
   // NOTE: this is ONLY valid in kernels 3.14 and up.  Its value will always
@@ -364,7 +364,7 @@ struct BASE_EXPORT SystemMemoryInfo {
 #endif
 
 #if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \
-    BUILDFLAG(IS_AIX) || BUILDFLAG(IS_FUCHSIA)
+    BUILDFLAG(IS_AIX) || BUILDFLAG(IS_FUCHSIA) || BUILDFLAG(IS_BSD)
   ByteCount buffers;
   ByteCount cached;
   ByteCount active_anon;
@@ -406,7 +406,7 @@ BASE_EXPORT bool GetSystemMemoryInfo(SystemMemoryInfo*
         // BUILDFLAG(IS_FUCHSIA)
 
 #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \
-    BUILDFLAG(IS_AIX)
+    BUILDFLAG(IS_AIX) || BUILDFLAG(IS_BSD)
 // Parse the data found in /proc/<pid>/stat and return the sum of the
 // CPU-related ticks.  Returns -1 on parse error.
 // Exposed for testing.
@@ -582,7 +582,7 @@ class BASE_EXPORT SystemMetrics {
   FRIEND_TEST_ALL_PREFIXES(SystemMetricsTest, SystemMetrics);
 
   size_t committed_memory_;
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
+#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_BSD)
   SystemMemoryInfo memory_info_;
   VmStatInfo vmstat_info_;
   SystemDiskInfo disk_info_;