Move sanbox_export.h to //sandbox from //sandbox/linux and split root OWNERS file.

sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h

 // Copyright (c) 2013 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.
 
 #ifndef SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SYSCALL_PARAMETERS_RESTRICTIONS_H_
 #define SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SYSCALL_PARAMETERS_RESTRICTIONS_H_
 
 #include <unistd.h>
 
 #include "build/build_config.h"
-#include "sandbox/linux/sandbox_export.h"
+#include "sandbox/sandbox_export.h"
 
 // These are helpers to build seccomp-bpf policies, i.e. policies for a
 // sandbox that reduces the Linux kernel's attack surface. They return an
 // SANDBOX_EXPORT ErrorCode suitable to restrict certain system call parameters.
 
 namespace sandbox {
 
 class ErrorCode;
 class SandboxBPF;
 
@@ skipping 36 matching lines @@
 #endif
 
 // Restrict |sysno| (which must be kill, tkill or tgkill) by allowing tgkill or
 // kill iff the first parameter is |target_pid|, crashing otherwise or if
 // |sysno| is tkill.
 ErrorCode RestrictKillTarget(pid_t target_pid, SandboxBPF* sandbox, int sysno);
 
 }  // namespace sandbox.
 
 #endif  // SANDBOX_LINUX_SECCOMP_BPF_HELPERS_SYSCALL_PARAMETERS_RESTRICTIONS_H_