Move WriteFile and WriteFileDescriptor from file_util to base namespace.

content/browser/download/base_file_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 "content/browser/download/base_file.h"
 
 #include "base/file_util.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 
 namespace content {
 
 DownloadInterruptReason BaseFile::MoveFileAndAdjustPermissions(
     const base::FilePath& new_path) {
   // Similarly, on Unix, we're moving a temp file created with permissions 600
   // to |new_path|. Here, we try to fix up the destination file with appropriate
   // permissions.
   struct stat st;
   // First check the file existence and create an empty file if it doesn't
   // exist.
   if (!base::PathExists(new_path)) {
-    int write_error = file_util::WriteFile(new_path, "", 0);
+    int write_error = base::WriteFile(new_path, "", 0);
     if (write_error < 0)
       return LogSystemError("WriteFile", errno);
   }
   int stat_error = stat(new_path.value().c_str(), &st);
   bool stat_succeeded = (stat_error == 0);
   if (!stat_succeeded)
     LogSystemError("stat", errno);
 
   // TODO(estade): Move() falls back to copying and deleting when a simple
   // rename fails. Copying sucks for large downloads. crbug.com/8737
   if (!base::Move(full_path_, new_path))
     return LogSystemError("Move", errno);
 
   if (stat_succeeded) {
     // On Windows file systems (FAT, NTFS), chmod fails.  This is OK.
     int chmod_error = chmod(new_path.value().c_str(), st.st_mode);
     if (chmod_error < 0)
       LogSystemError("chmod", errno);
   }
   return DOWNLOAD_INTERRUPT_REASON_NONE;
 }
 
 }  // namespace content