Rename OperationObserver to OperationDelegate

chrome/browser/chromeos/drive/file_system/operation_observer.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_SYSTEM_OPERATION_OBSERVER_H_
-#define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OPERATION_OBSERVER_H_
-
-#include "chrome/browser/chromeos/drive/file_errors.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace drive {
-class FileChange;
-
-namespace file_system {
-
-// Error type of sync client.
-// Keep it synced with "DriveSyncErrorType" in file_manager_private.idl.
-enum DriveSyncErrorType {
-  // Request to delete a file without permission.
-  DRIVE_SYNC_ERROR_DELETE_WITHOUT_PERMISSION,
-  // Google Drive is temporary unavailable.
-  DRIVE_SYNC_ERROR_SERVICE_UNAVAILABLE,
-  // Errors other than above ones. No fallback is provided for the error.
-  DRIVE_SYNC_ERROR_MISC,
-};
-
-// Passes notifications from Drive operations back to the file system.
-// TODO(hashimoto): Give this class a more appropriate name.
-class OperationObserver {
- public:
-  // Sent when a content of a directory has been changed.
-  // |directory_path| is a virtual directory path representing the
-  // changed directory.
-  virtual void OnFileChangedByOperation(const FileChange& changed_files) = 0;
-
-  // Sent when an entry is updated and sync is needed.
-  virtual void OnEntryUpdatedByOperation(const std::string& local_id) {}
-
-  // Sent when a specific drive sync error occurred.
-  // |local_id| is the local ID of the resource entry.
-  virtual void OnDriveSyncError(DriveSyncErrorType type,
-                                const std::string& local_id) {}
-
-  // Waits for the sync task to complete and runs the callback.
-  // Returns false if no task is found for the spcecified ID.
-  virtual bool WaitForSyncComplete(const std::string& local_id,
-                                   const FileOperationCallback& callback);
-};
-
-}  // namespace file_system
-}  // namespace drive
-
-#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OPERATION_OBSERVER_H_