SECCOMP-BPF: Refactor the BPF sandbox API to use fewer "static" fields and methods.

sandbox/linux/seccomp-bpf/die.cc

 // Copyright (c) 2012 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 <errno.h>
+#include <linux/unistd.h>
+#include <stdio.h>
+#include <sys/prctl.h>
+
 #include <string>
 
 #include "sandbox/linux/seccomp-bpf/sandbox_bpf.h"
 #include "sandbox/linux/seccomp-bpf/syscall.h"
 
 
 namespace playground2 {
 
 void Die::ExitGroup() {
   // exit_group() should exit our program. After all, it is defined as a
@@ skipping 54 matching lines @@
     // No need to loop. Short write()s are unlikely and if they happen we
     // probably prefer them over a loop that blocks.
     if (HANDLE_EINTR(SandboxSyscall(__NR_write, 2, s.c_str(), s.length()))) { }
   }
 }
 
 bool Die::simple_exit_   = false;
 bool Die::suppress_info_ = false;
 
 }  // namespace