Move temp file functions to base namespace.

chrome/browser/chromeos/drive/file_system/create_file_operation.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 "chrome/browser/chromeos/drive/file_system/create_file_operation.h"
 
 #include <string>
 
 #include "base/file_util.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
@@ skipping 96 matching lines @@
 
   if (error == FILE_ERROR_OK) {
     // At this point, upload to the server is fully succeeded.
     // Populate the |file_path| which will be used to notify the observer.
     *file_path = metadata->GetFilePath(local_id);
 
     // Also store an empty file to the cache.
     // Here, failure is not a fatal error, so ignore the returned code.
     FileError cache_store_error = FILE_ERROR_FAILED;
     base::FilePath empty_file;
-    if (file_util::CreateTemporaryFile(&empty_file)) {
+    if (base::CreateTemporaryFile(&empty_file)) {
       cache_store_error =  cache->Store(
           local_id,
           entry.file_specific_info().md5(),
           empty_file,
           internal::FileCache::FILE_OPERATION_MOVE);
     }
     DLOG_IF(WARNING, cache_store_error != FILE_ERROR_OK)
         << "Failed to store a cache file: "
         << FileErrorToString(cache_store_error)
         << ", local_id: " << local_id;
@@ skipping 117 matching lines @@
 
   // Notify observer if the file creation process is successfully done.
   if (error == FILE_ERROR_OK)
     observer_->OnDirectoryChangedByOperation(file_path->DirName());
 
   callback.Run(error);
 }
 
 }  // namespace file_system
 }  // namespace drive