Remove some deprecated file_util wstring functions.

chrome/test/mini_installer_test/run_all_unittests.cc

 // Copyright (c) 2009 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/command_line.h"
 #include "base/file_util.h"
 #include "base/test/test_suite.h"
 #include "chrome/test/mini_installer_test/mini_installer_test_constants.h"
 #include "chrome_mini_installer.h"
 
 void BackUpProfile() {
   if (base::GetProcessCount(L"chrome.exe", NULL) > 0) {
     printf("Chrome is currently running and cannot backup the profile."
            "Please close Chrome and run the tests again.\n");
     exit(1);
   }
   ChromeMiniInstaller installer(mini_installer_constants::kUserInstall);
-  std::wstring path = installer.GetChromeInstallDirectoryLocation();
-  file_util::AppendToPath(&path, mini_installer_constants::kChromeAppDir);
-  file_util::UpOneDirectory(&path);
-  std::wstring backup_path = path;
+  FilePath path =
+      FilePath::FromWStringHack(installer.GetChromeInstallDirectoryLocation());
+  path = path.Append(mini_installer_constants::kChromeAppDir).DirName();
+  FilePath backup_path = path;
   // Will hold User Data path that needs to be backed-up.
-  file_util::AppendToPath(&path,
-      mini_installer_constants::kChromeUserDataDir);
+  path = path.Append(mini_installer_constants::kChromeUserDataDir);
   // Will hold new backup path to save the profile.
-  file_util::AppendToPath(&backup_path,
-      mini_installer_constants::kChromeUserDataBackupDir);
+  backup_path = path.Append(mini_installer_constants::kChromeUserDataBackupDir);
   // Will check if User Data profile is available.
   if (file_util::PathExists(path)) {
     // Will check if User Data is already backed up.
     // If yes, will delete and create new one.
     if (file_util::PathExists(backup_path))
-      file_util::Delete(backup_path.c_str(), true);
+      file_util::Delete(backup_path, true);
     file_util::CopyDirectory(path, backup_path, true);
   } else {
     printf("Chrome is not installed. Will not take any backup\n");
   }
 }
 
 int main(int argc, char** argv) {
   // Check command line to decide if the tests should continue
   // with cleaning the system or make a backup before continuing.
   CommandLine::Init(argc, argv);
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch("clean")) {
     printf("Current version of Chrome will be uninstalled "
            "from all levels before proceeding with tests.\n");
   } else if (command_line.HasSwitch("backup")) {
     BackUpProfile();
   } else {
     printf("This test needs command line Arguments.\n");
     printf("Usage: mini_installer_tests.exe -{clean|backup}\n");
     printf("Note: -clean arg will uninstall your chrome at all levels"
            " and also delete profile.\n"
            "-backup arg will make a copy of User Data before uninstalling"
            " your chrome at all levels. The copy will be named as"
            " User Data Copy.\n");
     exit(1);
   }
   return TestSuite(argc, argv).Run();
 }