Move PathExists to base namespace.

chrome/browser/chromeos/settings/owner_key_util.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/settings/owner_key_util.h"
 
 #include <limits>
 
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 53 matching lines @@
       safe_file_size);
   return data_read == safe_file_size;
 }
 
 crypto::RSAPrivateKey* OwnerKeyUtilImpl::FindPrivateKey(
     const std::vector<uint8>& key) {
   return crypto::RSAPrivateKey::FindFromPublicKeyInfo(key);
 }
 
 bool OwnerKeyUtilImpl::IsPublicKeyPresent() {
-  return file_util::PathExists(key_file_);
+  return base::PathExists(key_file_);
 }
 
 }  // namespace chromeos