Move fileapi into its own component

webkit/fileapi/file_util_helper.h

 // 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.
 
 #ifndef WEBKIT_FILEAPI_FILE_UTIL_HELPER_H_
 #define WEBKIT_FILEAPI_FILE_UTIL_HELPER_H_
 
 #include <vector>
 
 #include "base/file_util_proxy.h"
 #include "base/platform_file.h"
+#include "webkit/fileapi/fileapi_export.h"
 
 namespace fileapi {
 
 class FileSystemFileUtil;
 class FileSystemOperationContext;
 class FileSystemPath;
 
 // A collection of static methods that are usually called by
 // FileSystemFileUtilProxy.  The method should be called on FILE thread.
-class FileUtilHelper {
+class FILEAPI_EXPORT_PRIVATE FileUtilHelper {
  public:
   static base::PlatformFileError Copy(
       FileSystemOperationContext* context,
       FileSystemFileUtil* src_file_util,
       FileSystemFileUtil* dest_file_utile,
       const FileSystemPath& src_root_path,
       const FileSystemPath& dest_root_path);
 
   static base::PlatformFileError Move(
       FileSystemOperationContext* context,
@@ skipping 17 matching lines @@
  private:
   static base::PlatformFileError DeleteDirectoryRecursive(
       FileSystemOperationContext* context,
       FileSystemFileUtil* file_util,
       const FileSystemPath& path);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_UTIL_HELPER_H_