* Revert "Por rt flush_cache tool."

base/file_util_linux.cc

 // Copyright (c) 2006-2008 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/file_util.h"
 
 #include <fcntl.h>
 
 #include <string>
 #include <vector>
@@ skipping 54 matching lines @@
   }
 
   if (close(infile) < 0)
     result = false;
   if (close(outfile) < 0)
     result = false;
 
   return result;
 }
 
-bool EvictFileFromSystemCache(const FilePath path) {
-  int fd = open(path.value().c_str(), O_RDONLY);
-  if (fd < 0)
-    return false;
-  if (fdatasync(fd) != 0)
-    return false;
-  if (posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED) != 0)
-    return false;
-  close(fd);
-  return true;
-}
-
 }  // namespace file_util