Move PathExists to base namespace.

chrome/installer/test/alternate_version_generator_main.cc

 // Copyright (c) 2011 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.
 
 // This file provides a command-line interface to
 // upgrade_test::GenerateAlternateVersion().
 
 #include <cstdio>
 #include <cstdlib>
 
@@ skipping 122 matching lines @@
     DumpUsage(*cmd_line, errors::SHOW_HELP, std::wstring());
     return EXIT_SUCCESS;
   }
 
   base::FilePath mini_installer;
   if (!GetMiniInstallerPath(*cmd_line, &mini_installer)) {
     DumpUsage(*cmd_line, errors::MINI_INSTALLER_NOT_FOUND, std::wstring());
     return EXIT_FAILURE;
   }
 
-  if (!file_util::PathExists(mini_installer)) {
+  if (!base::PathExists(mini_installer)) {
     DumpUsage(*cmd_line, errors::MINI_INSTALLER_NOT_FOUND,
               mini_installer.value());
     return EXIT_FAILURE;
   }
 
   base::FilePath out;
   GetOutPath(*cmd_line, &out);
-  if (!cmd_line->HasSwitch(switches::kForce) && file_util::PathExists(out)) {
+  if (!cmd_line->HasSwitch(switches::kForce) && base::PathExists(out)) {
     DumpUsage(*cmd_line, errors::OUT_FILE_EXISTS, out.value());
     return EXIT_FAILURE;
   }
 
   upgrade_test::Direction direction = GetDirection(*cmd_line);
 
   std::wstring original_version;
   std::wstring new_version;
 
   if (upgrade_test::GenerateAlternateVersion(mini_installer, out, direction,
                                              &original_version, &new_version)) {
     fwprintf(stdout, L"Generated version %s from version %s\n",
              new_version.c_str(), original_version.c_str());
     return EXIT_SUCCESS;
   }
 
   DumpUsage(*cmd_line, errors::GENERATION_FAILED, mini_installer.value());
   return EXIT_FAILURE;
 }