Move webkit/fileapi/file_system_mount_point_provider.h to webkit/browser/fileapi

webkit/fileapi/file_system_usage_cache.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_SYSTEM_USAGE_CACHE_H_
-#define WEBKIT_FILEAPI_FILE_SYSTEM_USAGE_CACHE_H_
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/files/file_path.h"
-#include "base/memory/weak_ptr.h"
-#include "base/platform_file.h"
-#include "base/sequenced_task_runner.h"
-#include "base/timer.h"
-#include "webkit/storage/webkit_storage_export.h"
-
-namespace fileapi {
-
-class WEBKIT_STORAGE_EXPORT_PRIVATE FileSystemUsageCache {
- public:
-  explicit FileSystemUsageCache(base::SequencedTaskRunner* task_runner);
-  ~FileSystemUsageCache();
-
-  // Gets the size described in the .usage file even if dirty > 0 or
-  // is_valid == false.  Returns true if the .usage file is available.
-  bool GetUsage(const base::FilePath& usage_file_path, int64* usage);
-
-  // Gets the dirty count in the .usage file.
-  // Returns true if the .usage file is available.
-  bool GetDirty(const base::FilePath& usage_file_path, uint32* dirty);
-
-  // Increments or decrements the "dirty" entry in the .usage file.
-  // Returns false if no .usage is available.
-  bool IncrementDirty(const base::FilePath& usage_file_path);
-  bool DecrementDirty(const base::FilePath& usage_file_path);
-
-  // Notifies quota system that it needs to recalculate the usage cache of the
-  // origin.  Returns false if no .usage is available.
-  bool Invalidate(const base::FilePath& usage_file_path);
-  bool IsValid(const base::FilePath& usage_file_path);
-
-  // Updates the size described in the .usage file.
-  bool UpdateUsage(const base::FilePath& usage_file_path, int64 fs_usage);
-
-  // Updates the size described in the .usage file by delta with keeping dirty
-  // even if dirty > 0.
-  bool AtomicUpdateUsageByDelta(const base::FilePath& usage_file_path,
-                                int64 delta);
-
-  bool Exists(const base::FilePath& usage_file_path);
-  bool Delete(const base::FilePath& usage_file_path);
-
-  void CloseCacheFiles();
-
-  static const base::FilePath::CharType kUsageFileName[];
-  static const char kUsageFileHeader[];
-  static const int kUsageFileSize;
-  static const int kUsageFileHeaderSize;
-
- private:
-  typedef std::map<base::FilePath, base::PlatformFile> CacheFiles;
-
-  // Read the size, validity and the "dirty" entry described in the .usage file.
-  // Returns less than zero if no .usage file is available.
-  bool Read(const base::FilePath& usage_file_path,
-            bool* is_valid,
-            uint32* dirty,
-            int64* usage);
-
-  bool Write(const base::FilePath& usage_file_path,
-             bool is_valid,
-             int32 dirty,
-             int64 fs_usage);
-
-  bool GetPlatformFile(const base::FilePath& file_path,
-                       base::PlatformFile* file);
-
-  bool ReadBytes(const base::FilePath& file_path,
-                 char* buffer,
-                 int64 buffer_size);
-  bool WriteBytes(const base::FilePath& file_path,
-                  const char* buffer,
-                  int64 buffer_size);
-  bool FlushFile(const base::FilePath& file_path);
-  void ScheduleCloseTimer();
-
-  bool HasCacheFileHandle(const base::FilePath& file_path);
-
-  bool CalledOnValidThread();
-
-  base::OneShotTimer<FileSystemUsageCache> timer_;
-  std::map<base::FilePath, base::PlatformFile> cache_files_;
-  base::WeakPtrFactory<FileSystemUsageCache> weak_factory_;
-
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(FileSystemUsageCache);
-};
-
-}  // namespace fileapi
-
-#endif  // WEBKIT_FILEAPI_FILE_SYSTEM_USAGE_CACHE_H_