Clean-up the SandboxSyscall interface

sandbox/linux/seccomp-bpf/sandbox_bpf.h

 // 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.
 
 #ifndef SANDBOX_LINUX_SECCOMP_BPF_SANDBOX_BPF_H__
 #define SANDBOX_LINUX_SECCOMP_BPF_SANDBOX_BPF_H__
 
 #include <stddef.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "sandbox/linux/seccomp-bpf/die.h"
 #include "sandbox/linux/seccomp-bpf/errorcode.h"
 #include "sandbox/linux/seccomp-bpf/linux_seccomp.h"
 #include "sandbox/sandbox_export.h"
 
 namespace sandbox {
 
+// This must match the kernel's seccomp_data structure.
 struct arch_seccomp_data {
   int nr;
   uint32_t arch;
   uint64_t instruction_pointer;
   uint64_t args[6];
 };
 
 struct arch_sigsys {
   void* ip;
   int nr;
@@ skipping 221 matching lines @@
   scoped_ptr<const SandboxBPFPolicy> policy_;
   Conds* conds_;
   bool sandbox_has_started_;
 
   DISALLOW_COPY_AND_ASSIGN(SandboxBPF);
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_LINUX_SECCOMP_BPF_SANDBOX_BPF_H__