Switch to standard integer types in base/memory/.

base/memory/shared_memory_nacl.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 "base/memory/shared_memory.h"
 
 #include <errno.h>
 #include <fcntl.h>
+#include <stddef.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <unistd.h>
 
 #include <limits>
 
 #include "base/logging.h"
 
 namespace base {
 
@@ skipping 136 matching lines @@
   new_handle->auto_close = true;
 
   if (close_self) {
     Unmap();
     Close();
   }
   return true;
 }
 
 }  // namespace base