GN: aix port along with linux_s390x, linux_ppc64 and linux_ppc64le support.

base/process/process_metrics.h

Index: base/process/process_metrics.h
diff --git a/base/process/process_metrics.h b/base/process/process_metrics.h
index 1562e7b156af082292b3c8a4753a4b26fb7ecfcd..687797eb9fb6c19e885ff49d414f48ec24ef1516 100644
--- a/base/process/process_metrics.h
+++ b/base/process/process_metrics.h
@@ -195,7 +195,7 @@ class BASE_EXPORT ProcessMetrics {
   // otherwise.
   bool GetIOCounters(IoCounters* io_counters) const;
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_AIX)
   // Returns the number of file descriptors currently open by the process, or
   // -1 on error.
   int GetOpenFdCount() const;
@@ -203,7 +203,7 @@ class BASE_EXPORT ProcessMetrics {
   // Returns the soft limit of file descriptors that can be opened by the
   // process, or -1 on error.
   int GetOpenFdSoftLimit() const;
-#endif  // defined(OS_LINUX)
+#endif  // defined(OS_LINUX) || defined(OS_AIX)
 
  private:
 #if !defined(OS_MACOSX) || defined(OS_IOS)
@@ -212,7 +212,7 @@ class BASE_EXPORT ProcessMetrics {
   ProcessMetrics(ProcessHandle process, PortProvider* port_provider);
 #endif  // !defined(OS_MACOSX) || defined(OS_IOS)
 
-#if defined(OS_LINUX) || defined(OS_ANDROID)
+#if defined(OS_LINUX) || defined(OS_ANDROID) | defined(OS_AIX)
   bool GetWorkingSetKBytesStatm(WorkingSetKBytes* ws_usage) const;
 #endif
 
@@ -220,7 +220,7 @@ class BASE_EXPORT ProcessMetrics {
   bool GetWorkingSetKBytesTotmaps(WorkingSetKBytes *ws_usage) const;
 #endif
 
-#if defined(OS_MACOSX) || defined(OS_LINUX)
+#if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_AIX)
   int CalculateIdleWakeupsPerSecond(uint64_t absolute_idle_wakeups);
 #endif
 
@@ -237,7 +237,7 @@ class BASE_EXPORT ProcessMetrics {
   TimeTicks last_cpu_time_;
   int64_t last_system_time_;
 
-#if defined(OS_MACOSX) || defined(OS_LINUX)
+#if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_AIX)
   // Same thing for idle wakeups.
   TimeTicks last_idle_wakeups_time_;
   uint64_t last_absolute_idle_wakeups_;
@@ -279,7 +279,7 @@ BASE_EXPORT void SetFdLimit(unsigned int max_descriptors);
 #endif  // defined(OS_POSIX)
 
 #if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX) || \
-    defined(OS_ANDROID)
+    defined(OS_ANDROID) || defined(OS_AIX)
 // Data about system-wide memory consumption. Values are in KB. Available on
 // Windows, Mac, Linux, Android and Chrome OS.
 //
@@ -312,7 +312,7 @@ struct BASE_EXPORT SystemMemoryInfoKB {
   int avail_phys = 0;
 #endif
 
-#if defined(OS_LINUX) || defined(OS_ANDROID)
+#if defined(OS_LINUX) || defined(OS_ANDROID) || defined(OS_AIX)
   // 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
@@ -326,7 +326,7 @@ struct BASE_EXPORT SystemMemoryInfoKB {
   int swap_free = 0;
 #endif
 
-#if defined(OS_ANDROID) || defined(OS_LINUX)
+#if defined(OS_ANDROID) || defined(OS_LINUX) || defined(OS_AIX)
   int buffers = 0;
   int cached = 0;
   int active_anon = 0;
@@ -340,7 +340,7 @@ struct BASE_EXPORT SystemMemoryInfoKB {
   unsigned long pswpin = 0;
   unsigned long pswpout = 0;
   unsigned long pgmajfault = 0;
-#endif  // defined(OS_ANDROID) || defined(OS_LINUX)
+#endif  // defined(OS_ANDROID) || defined(OS_LINUX) || defined(OS_AIX)
 
 #if defined(OS_CHROMEOS)
   int shmem = 0;
@@ -368,7 +368,7 @@ BASE_EXPORT bool GetSystemMemoryInfo(SystemMemoryInfoKB* meminfo);
 #endif  // defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX) ||
         // defined(OS_ANDROID)
 
-#if defined(OS_LINUX) || defined(OS_ANDROID)
+#if defined(OS_LINUX) || defined(OS_ANDROID) || defined(OS_AIX)
 // 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.