Keep sync tasks alive as long as it's not finished

chrome/browser/chromeos/drive/file_errors.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 CHROME_BROWSER_CHROMEOS_DRIVE_FILE_ERRORS_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_ERRORS_H_
 
 #include "base/callback_forward.h"
 #include "base/files/file.h"
 #include "google_apis/drive/gdata_errorcode.h"
@@ skipping 13 matching lines @@
   FILE_ERROR_NOT_A_DIRECTORY = -9,
   FILE_ERROR_INVALID_OPERATION = -10,
   FILE_ERROR_SECURITY = -11,
   FILE_ERROR_ABORT = -12,
   FILE_ERROR_NOT_A_FILE = -13,
   FILE_ERROR_NOT_EMPTY = -14,
   FILE_ERROR_INVALID_URL = -15,
   FILE_ERROR_NO_CONNECTION = -16,
   FILE_ERROR_NO_LOCAL_SPACE = -17,
   FILE_ERROR_SERVICE_UNAVAILABLE = -18,
+  FILE_ERROR_PARENT_NEEDS_TO_BE_SYNCED = -19,
 };
 
 // Used as callbacks for file operations.
 typedef base::Callback<void(FileError error)> FileOperationCallback;
 
 // Returns a string representation of FileError.
 std::string FileErrorToString(FileError error);
 
 // Returns a base::File::Error that corresponds to the FileError provided.
 base::File::Error FileErrorToBaseFileError(FileError error);
 
 // Converts GData error code into Drive file error code.
 FileError GDataToFileError(google_apis::GDataErrorCode status);
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_ERRORS_H_