1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OBSERVER_H_ 6#define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OBSERVER_H_ 7 8#include "chrome/browser/chromeos/drive/file_errors.h" 9 10namespace base { 11class FilePath; 12} 13 14namespace drive { 15 16// Interface for classes that need to observe events from classes implementing 17// FileSystemInterface. 18// All events are notified on UI thread. 19class FileSystemObserver { 20 public: 21 // Triggered when a content of a directory has been changed. 22 // |directory_path| is a virtual directory path (/drive/...) representing 23 // changed directory. 24 virtual void OnDirectoryChanged(const base::FilePath& directory_path) {} 25 26 protected: 27 virtual ~FileSystemObserver() {} 28}; 29 30} // namespace drive 31 32#endif // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_OBSERVER_H_ 33