Update from https://crrev.com/303153

base/files/file_util_posix.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/files/file_util.h"
 
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <libgen.h>
@@ skipping 41 matching lines @@
 #include "base/android/content_uri_utils.h"
 #include "base/os_compat_android.h"
 #endif
 
 #if !defined(OS_IOS)
 #include <grp.h>
 #endif
 
 namespace base {
 
-#if !defined(__native_client_nonsfi__)
+#if !defined(OS_NACL_NONSFI)
 namespace {
 
 #if defined(OS_BSD) || defined(OS_MACOSX) || defined(OS_NACL)
 static int CallStat(const char *path, stat_wrapper_t *sb) {
   ThreadRestrictions::AssertIOAllowed();
   return stat(path, sb);
 }
 static int CallLstat(const char *path, stat_wrapper_t *sb) {
   ThreadRestrictions::AssertIOAllowed();
   return lstat(path, sb);
@@ skipping 268 matching lines @@
                     << current.value();
     }
 
     current = traversal.Next();
     if (!current.empty())
       from_stat = traversal.GetInfo().stat();
   }
 
   return success;
 }
-#endif  // !defined(__native_client_nonsfi__)
+#endif  // !defined(OS_NACL_NONSFI)
 
 bool PathExists(const FilePath& path) {
   ThreadRestrictions::AssertIOAllowed();
 #if defined(OS_ANDROID)
   if (path.IsContentUri()) {
     return ContentUriExists(path);
   }
 #endif
   return access(path.value().c_str(), F_OK) == 0;
 }
 
-#if !defined(__native_client_nonsfi__)
+#if !defined(OS_NACL_NONSFI)
 bool PathIsWritable(const FilePath& path) {
   ThreadRestrictions::AssertIOAllowed();
   return access(path.value().c_str(), W_OK) == 0;
 }
 
 bool DirectoryExists(const FilePath& path) {
   ThreadRestrictions::AssertIOAllowed();
   stat_wrapper_t file_info;
   if (CallStat(path.value().c_str(), &file_info) == 0)
     return S_ISDIR(file_info.st_mode);
   return false;
 }
-#endif  // !defined(__native_client_nonsfi__)
+#endif  // !defined(OS_NACL_NONSFI)
 
 bool ReadFromFD(int fd, char* buffer, size_t bytes) {
   size_t total_read = 0;
   while (total_read < bytes) {
     ssize_t bytes_read =
         HANDLE_EINTR(read(fd, buffer + total_read, bytes - total_read));
     if (bytes_read <= 0)
       break;
     total_read += bytes_read;
   }
   return total_read == bytes;
 }
 
-#if !defined(__native_client_nonsfi__)
+#if !defined(OS_NACL_NONSFI)
 bool CreateSymbolicLink(const FilePath& target_path,
                         const FilePath& symlink_path) {
   DCHECK(!symlink_path.empty());
   DCHECK(!target_path.empty());
   return ::symlink(target_path.value().c_str(),
                    symlink_path.value().c_str()) != -1;
 }
 
 bool ReadSymbolicLink(const FilePath& symlink_path, FilePath* target_path) {
   DCHECK(!symlink_path.empty());
@@ skipping 520 matching lines @@
     result = false;
   if (IGNORE_EINTR(close(outfile)) < 0)
     result = false;
 
   return result;
 }
 #endif  // !defined(OS_MACOSX)
 
 }  // namespace internal
 
-#endif  // !defined(__native_client_nonsfi__)
+#endif  // !defined(OS_NACL_NONSFI)
 }  // namespace base