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

base/process/process_linux.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/process/process.h"
 
 #include <errno.h>
 #include <sys/resource.h>
 
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 
+// Not defined on AIX by default.
+#if defined(OS_AIX)
+#define RLIMIT_NICE 20
+#endif
+
 namespace base {
 
 namespace {
 
 const int kForegroundPriority = 0;
 
 #if defined(OS_CHROMEOS)
 // We are more aggressive in our lowering of background process priority
 // for chromeos as we have much more control over other processes running
 // on the machine.
@@ skipping 165 matching lines @@
         return kNullProcessId;
       }
       return value;
     }
   }
   return kNullProcessId;
 }
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace base