Revert of Switch to standard integer types in sandbox/.

sandbox/linux/bpf_dsl/syscall_set_unittest.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 "sandbox/linux/bpf_dsl/syscall_set.h"
 
-#include <stddef.h>
 #include <stdint.h>
 
 #include "sandbox/linux/bpf_dsl/linux_syscall_ranges.h"
 #include "sandbox/linux/tests/unit_tests.h"
 
 namespace sandbox {
 
 namespace {
 
 const SyscallSet kSyscallSets[] = {
@@ skipping 98 matching lines @@
              invalid_only.end(),
              std::back_inserter(merged));
 
   const SyscallSet all = SyscallSet::All();
   SANDBOX_ASSERT(merged == std::vector<uint32_t>(all.begin(), all.end()));
 }
 
 }  // namespace
 
 }  // namespace sandbox