Revert of Switch to standard integer types in sandbox/.

sandbox/linux/seccomp-bpf/trap.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_TRAP_H__
 #define SANDBOX_LINUX_SECCOMP_BPF_TRAP_H__
 
-#include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 
 #include "base/macros.h"
 #include "sandbox/linux/bpf_dsl/trap_registry.h"
 #include "sandbox/linux/system_headers/linux_signal.h"
 #include "sandbox/sandbox_export.h"
 
 namespace sandbox {
@@ skipping 58 matching lines @@
   bool has_unsafe_traps_;       // Whether unsafe traps have been enabled
 
   // Copying and assigning is unimplemented. It doesn't make sense for a
   // singleton.
   DISALLOW_COPY_AND_ASSIGN(Trap);
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_LINUX_SECCOMP_BPF_TRAP_H__