Merge CrossFileUtilHelper to FileUtilHelper as Copy() and Move().

webkit/fileapi/cross_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_CROSS_FILE_UTIL_HELPER_H_
-#define WEBKIT_FILEAPI_CROSS_FILE_UTIL_HELPER_H_
-
-#include "base/callback.h"
-#include "base/platform_file.h"
-
-namespace fileapi {
-
-class FileSystemFileUtil;
-class FileSystemOperationContext;
-class FileSystemPath;
-
-// A helper class for cross-FileUtil Copy/Move operations.
-class CrossFileUtilHelper {
- public:
-  enum Operation {
-    OPERATION_COPY,
-    OPERATION_MOVE
-  };
-
-  CrossFileUtilHelper(FileSystemOperationContext* context,
-                      FileSystemFileUtil* src_util,
-                      FileSystemFileUtil* dest_util,
-                      const FileSystemPath& src_path,
-                      const FileSystemPath& dest_path,
-                      Operation operation);
-  ~CrossFileUtilHelper();
-
-  base::PlatformFileError DoWork();
-
- private:
-  // Performs common pre-operation check and preparation.
-  // This may delete the destination directory if it's empty.
-  base::PlatformFileError PerformErrorCheckAndPreparationForMoveAndCopy();
-
-  // This assumes that the root exists.
-  bool ParentExists(const FileSystemPath& path, FileSystemFileUtil* file_util);
-
-  // Performs recursive copy or move by calling CopyOrMoveFile for individual
-  // files. Operations for recursive traversal are encapsulated in this method.
-  // It assumes src_path and dest_path have passed
-  // PerformErrorCheckAndPreparationForMoveAndCopy().
-  base::PlatformFileError CopyOrMoveDirectory(
-      const FileSystemPath& src_path,
-      const FileSystemPath& dest_path);
-
-  // Determines whether a simple same-filesystem move or copy can be done.  If
-  // so, it delegates to CopyOrMoveFile.  Otherwise it looks up the true
-  // platform path of the source file, delegates to CopyInForeignFile, and [for
-  // move] calls DeleteFile on the source file.
-  base::PlatformFileError CopyOrMoveFile(
-      const FileSystemPath& src_path,
-      const FileSystemPath& dest_path);
-
-  FileSystemOperationContext* context_;
-  FileSystemFileUtil* src_util_;  // Not owned.
-  FileSystemFileUtil* dest_util_;  // Not owned.
-  const FileSystemPath& src_root_path_;
-  const FileSystemPath& dest_root_path_;
-  Operation operation_;
-
-  DISALLOW_COPY_AND_ASSIGN(CrossFileUtilHelper);
-};
-
-}  // namespace fileapi
-
-#endif  // WEBKIT_FILEAPI_CROSS_FILE_UTIL_HELPER_H_