Move some more file utils to the base namespace.

webkit/browser/fileapi/native_file_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 "webkit/browser/fileapi/native_file_util.h"
 
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/memory/scoped_ptr.h"
 #include "webkit/browser/fileapi/file_system_operation_context.h"
@@ skipping 246 matching lines @@
   if (!base::DeleteFile(path, false))
     return base::PLATFORM_FILE_ERROR_FAILED;
   return base::PLATFORM_FILE_OK;
 }
 
 PlatformFileError NativeFileUtil::DeleteDirectory(const base::FilePath& path) {
   if (!base::PathExists(path))
     return base::PLATFORM_FILE_ERROR_NOT_FOUND;
   if (!base::DirectoryExists(path))
     return base::PLATFORM_FILE_ERROR_NOT_A_DIRECTORY;
-  if (!file_util::IsDirectoryEmpty(path))
+  if (!base::IsDirectoryEmpty(path))
     return base::PLATFORM_FILE_ERROR_NOT_EMPTY;
   if (!base::DeleteFile(path, false))
     return base::PLATFORM_FILE_ERROR_FAILED;
   return base::PLATFORM_FILE_OK;
 }
 
 }  // namespace fileapi