Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/chromeos/app_mode/kiosk_app_update_service_browsertest.cc

 // Copyright 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 <string>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
@@ skipping 34 matching lines @@
     extensions::PlatformAppBrowserTest::SetUpOnMainThread();
 
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     const base::FilePath& temp_dir = temp_dir_.path();
 
     const base::TimeDelta uptime = base::TimeDelta::FromHours(1);
     const std::string uptime_seconds =
         base::DoubleToString(uptime.InSecondsF());
     const base::FilePath uptime_file = temp_dir.Append("uptime");
     ASSERT_EQ(static_cast<int>(uptime_seconds.size()),
-              file_util::WriteFile(
+              base::WriteFile(
                   uptime_file, uptime_seconds.c_str(), uptime_seconds.size()));
     uptime_file_override_.reset(
         new base::ScopedPathOverride(chromeos::FILE_UPTIME, uptime_file));
 
     app_ = LoadExtension(
         test_data_dir_.AppendASCII("api_test/runtime/on_restart_required"));
 
     // Fake app mode command line.
     CommandLine* command = CommandLine::ForCurrentProcess();
     command->AppendSwitch(switches::kForceAppMode);
@@ skipping 43 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(KioskAppUpdateServiceTest, Periodic) {
   g_browser_process->local_state()->SetInteger(
       prefs::kUptimeLimit, base::TimeDelta::FromMinutes(30).InSeconds());
 
   ExtensionTestMessageListener listener("periodic", false);
   listener.WaitUntilSatisfied();
 }
 
 }  // namespace chromeos