Remove CloseFile from FileSystem.

chrome/browser/chromeos/drive/file_system/close_file_operation.h

-// Copyright 2013 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_CLOSE_FILE_OPERATION_H_
-#define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CLOSE_FILE_OPERATION_H_
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "chrome/browser/chromeos/drive/file_errors.h"
-
-namespace base {
-class FilePath;
-class SequencedTaskRunner;
-}  // namespace base
-
-namespace drive {
-
-class ResourceEntry;
-
-namespace internal {
-class ResourceMetadata;
-}  // namespace internal
-
-namespace file_system {
-
-class OperationObserver;
-
-class CloseFileOperation {
- public:
-  CloseFileOperation(base::SequencedTaskRunner* blocking_task_runner,
-                     OperationObserver* observer,
-                     internal::ResourceMetadata* metadata,
-                     std::map<base::FilePath, int>* open_files);
-  ~CloseFileOperation();
-
-  // Closes the currently opened file |file_path|.
-  // |callback| must not be null.
-  void CloseFile(const base::FilePath& file_path,
-                 const FileOperationCallback& callback);
-
- private:
-  // Part of CloseFile(). Called after ResourceMetadata::GetResourceEntry().
-  void CloseFileAfterGetResourceEntry(const base::FilePath& file_path,
-                                      const FileOperationCallback& callback,
-                                      const ResourceEntry* entry,
-                                      FileError error);
-
-  scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
-  OperationObserver* observer_;
-  internal::ResourceMetadata* metadata_;
-
-  // The map from paths for opened file to the number how many the file is
-  // opened. The instance is owned by FileSystem and shared with
-  // OpenFileOperation.
-  std::map<base::FilePath, int>* open_files_;
-
-  // Note: This should remain the last member so it'll be destroyed and
-  // invalidate its weak pointers before any other members are destroyed.
-  base::WeakPtrFactory<CloseFileOperation> weak_ptr_factory_;
-  DISALLOW_COPY_AND_ASSIGN(CloseFileOperation);
-};
-
-}  // namespace file_system
-}  // namespace drive
-
-#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CLOSE_FILE_OPERATION_H_