Move WriteFile and WriteFileDescriptor from file_util to base namespace.

net/disk_cache/simple/simple_index_file.cc

 // Copyright (c) 2013 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 "net/disk_cache/simple/simple_index_file.h"
 
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/files/memory_mapped_file.h"
@@ skipping 48 matching lines @@
 };
 
 void UmaRecordIndexInitMethod(IndexInitMethod method,
                               net::CacheType cache_type) {
   SIMPLE_CACHE_UMA(ENUMERATION,
                    "IndexInitializeMethod", cache_type,
                    method, INITIALIZE_METHOD_MAX);
 }
 
 bool WritePickleFile(Pickle* pickle, const base::FilePath& file_name) {
-  int bytes_written = file_util::WriteFile(
+  int bytes_written = base::WriteFile(
       file_name, static_cast<const char*>(pickle->data()), pickle->size());
   if (bytes_written != implicit_cast<int>(pickle->size())) {
     base::DeleteFile(file_name, /* recursive = */ false);
     return false;
   }
   return true;
 }
 
 // Called for each cache directory traversal iteration.
 void ProcessEntryFile(SimpleIndex::EntrySet* entries,
@@ skipping 374 matching lines @@
 bool SimpleIndexFile::LegacyIsIndexFileStale(
     base::Time cache_last_modified,
     const base::FilePath& index_file_path) {
   base::Time index_mtime;
   if (!simple_util::GetMTime(index_file_path, &index_mtime))
     return true;
   return index_mtime < cache_last_modified;
 }
 
 }  // namespace disk_cache