Update from https://crrev.com/315085

sandbox/linux/bpf_dsl/syscall_set.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_SYSCALL_ITERATOR_H__
-#define SANDBOX_LINUX_SECCOMP_BPF_SYSCALL_ITERATOR_H__
+#ifndef SANDBOX_LINUX_BPF_DSL_SYSCALL_SET_H__
+#define SANDBOX_LINUX_BPF_DSL_SYSCALL_SET_H__
 
 #include <stdint.h>
 
 #include <iterator>
 
 #include "base/macros.h"
 #include "sandbox/sandbox_export.h"
 
 namespace sandbox {
 
-// TODO(mdempsky): Rename this header to syscall_set.h.
-
 // Iterates over the entire system call range from 0..0xFFFFFFFFu. This
 // iterator is aware of how system calls look like and will skip quickly
 // over ranges that can't contain system calls. It iterates more slowly
 // whenever it reaches a range that is potentially problematic, returning
 // the last invalid value before a valid range of system calls, and the
 // first invalid value after a valid range of syscalls. It iterates over
 // individual values whenever it is in the normal range for system calls
 // (typically MIN_SYSCALL..MAX_SYSCALL).
 //
 // Example usage:
@@ skipping 66 matching lines @@
   DISALLOW_ASSIGN(Iterator);
 };
 
 SANDBOX_EXPORT bool operator==(const SyscallSet::Iterator& lhs,
                                const SyscallSet::Iterator& rhs);
 SANDBOX_EXPORT bool operator!=(const SyscallSet::Iterator& lhs,
                                const SyscallSet::Iterator& rhs);
 
 }  // namespace sandbox
 
-#endif  // SANDBOX_LINUX_SECCOMP_BPF_SYSCALL_ITERATOR_H__
+#endif  // SANDBOX_LINUX_BPF_DSL_SYSCALL_SET_H__