Move temp file functions to base namespace.

chrome/browser/extensions/api/image_writer_private/write_from_url_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 "base/file_util.h"
 #include "base/threading/worker_pool.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/image_writer_private/error_messages.h"
 #include "chrome/browser/extensions/api/image_writer_private/operation_manager.h"
 #include "chrome/browser/extensions/api/image_writer_private/write_from_url_operation.h"
@@ skipping 49 matching lines @@
   AddCleanUpFunction(base::Bind(&WriteFromUrlOperation::DownloadCleanUp, this));
 }
 
 void WriteFromUrlOperation::CreateTempFile() {
   if (IsCancelled()) {
     return;
   }
 
   tmp_file_.reset(new base::FilePath());
 
-  if (file_util::CreateTemporaryFile(tmp_file_.get())) {
+  if (base::CreateTemporaryFile(tmp_file_.get())) {
     BrowserThread::PostTask(
         BrowserThread::UI,
         FROM_HERE,
         base::Bind(&WriteFromUrlOperation::DownloadStart, this));
   } else {
     Error(error::kTempFile);
   }
 }
 
 // The downloader runs on the UI thread.
@@ skipping 169 matching lines @@
   DVLOG(1) << "Download verification complete.";
 
   SetProgress(kProgressComplete);
 
   scoped_ptr<base::FilePath> download_path(new base::FilePath(download_path_));
   UnzipStart(download_path.Pass());
 }
 
 } // namespace image_writer
 } // namespace extensions