Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/chromeos/external_metrics.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 "chrome/browser/chromeos/external_metrics.h"
 
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 72 matching lines @@
 
   // Announce the experiment to any listeners (especially important is the UMA
   // software, which will append the group names to UMA statistics).
   const int group_num = trial->group();
   std::string group_char = "x";
   if (ContainsKey(group_to_char, group_num))
     group_char = group_to_char[group_num];
 
   // Write the group to the file to be read by ChromeOS.
   int size = static_cast<int>(group_char.length());
-  if (file_util::WriteFile(group_file_path, group_char.c_str(), size) == size) {
+  if (base::WriteFile(group_file_path, group_char.c_str(), size) == size) {
     VLOG(1) << "Configured in group '" << trial->group_name()
             << "' ('" << group_char << "') for "
             << name_of_experiment << " field trial";
   } else {
     VLOG(1) << "Couldn't write to " << group_file_path.value();
   }
 }
 
 }  // namespace
 
@@ skipping 248 matching lines @@
 void ExternalMetrics::SetupFieldTrialsOnFileThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   // Field trials that do not read from files can be initialized in
   // ExternalMetrics::Start() above.
   SetupProgressiveScanFieldTrial();
 
   ScheduleCollector();
 }
 
 }  // namespace chromeos