Move PathExists to base namespace.

chrome/installer/setup/uninstall.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.
 //
 // This file defines the methods useful for uninstalling Chrome.
 
 #include "chrome/installer/setup/uninstall.h"
 
 #include <windows.h>
 
@@ skipping 409 matching lines @@
 // Creates a copy of the local state file and returns a path to the copy.
 base::FilePath BackupLocalStateFile(
     const std::vector<base::FilePath>& local_state_folders) {
   base::FilePath backup;
 
   // Copy the first local state file that is found.
   for (size_t i = 0; i < local_state_folders.size(); ++i) {
     const base::FilePath& local_state_folder = local_state_folders[i];
     base::FilePath state_file(
         local_state_folder.Append(chrome::kLocalStateFilename));
-    if (!file_util::PathExists(state_file))
+    if (!base::PathExists(state_file))
       continue;
     if (!file_util::CreateTemporaryFile(&backup))
       LOG(ERROR) << "Failed to create temporary file for Local State.";
     else
       base::CopyFile(state_file, backup);
     break;
   }
   return backup;
 }
 
@@ skipping 985 matching lines @@
     // deletion unconditionally. If they are not empty, the session manager
     // will not delete them on reboot.
     ScheduleParentAndGrandparentForDeletion(target_path);
   } else if (DeleteApplicationProductAndVendorDirectories(target_path) ==
              installer::DELETE_FAILED) {
     *uninstall_status = installer::UNINSTALL_FAILED;
   }
 }
 
 }  // namespace installer