[SyncFS] Move SyncFS V1 files from drive_backend to drive_backend_v1

chrome/browser/sync_file_system/drive_backend/remote_change_handler.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_SYNC_FILE_SYSTEM_DRIVE_BACKEND_REMOTE_CHANGE_HANDLER_H_
-#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_REMOTE_CHANGE_HANDLER_H_
-
-#include <map>
-#include <set>
-#include <string>
-#include <utility>
-
-#include "base/files/file_path.h"
-#include "base/stl_util.h"
-#include "base/time/time.h"
-#include "chrome/browser/sync_file_system/file_change.h"
-#include "webkit/browser/fileapi/file_system_url.h"
-
-namespace sync_file_system {
-
-// Manages pending remote file changes.
-class RemoteChangeHandler {
- public:
-  struct RemoteChange {
-    int64 changestamp;
-    std::string resource_id;
-    std::string md5_checksum;
-    base::Time updated_time;
-    fileapi::FileSystemURL url;
-    FileChange change;
-
-    RemoteChange();
-    RemoteChange(int64 changestamp,
-                 const std::string& resource_id,
-                 const std::string& md5_checksum,
-                 const base::Time& updated_time,
-                 const fileapi::FileSystemURL& url,
-                 const FileChange& change);
-    ~RemoteChange();
-  };
-
-  struct RemoteChangeComparator {
-    bool operator()(const RemoteChange& left, const RemoteChange& right);
-  };
-
-  RemoteChangeHandler();
-  virtual ~RemoteChangeHandler();
-
-  // Pushes the next change into |remote_change| and returns true.
-  bool GetChange(RemoteChange* remote_change);
-
-  // Pushes the change for the |url| into |remote_change| and returns true.
-  bool GetChangeForURL(const fileapi::FileSystemURL& url,
-                       RemoteChange* remote_change);
-
-  // Appends |remote_change| into the change queue. |remote_change| overrides an
-  // existing change for the same URL if exists.
-  void AppendChange(const RemoteChange& remote_change);
-
-  // Removes a change for the |url|.
-  bool RemoveChangeForURL(const fileapi::FileSystemURL& url);
-
-  // Removes changes for the |origin|.
-  void RemoveChangesForOrigin(const GURL& origin);
-
-  bool HasChangesForOrigin(const GURL& origin) const;
-  bool HasChanges() const { return !changes_.empty(); }
-  size_t ChangesSize() const { return changes_.size(); }
-
- private:
-  struct ChangeQueueItem {
-    int64 changestamp;
-    fileapi::FileSystemURL url;
-
-    ChangeQueueItem();
-    ChangeQueueItem(int64 changestamp,
-                    const fileapi::FileSystemURL& url);
-  };
-
-  struct ChangeQueueComparator {
-    bool operator()(const ChangeQueueItem& left, const ChangeQueueItem& right);
-  };
-
-  typedef std::set<ChangeQueueItem, ChangeQueueComparator> PendingChangeQueue;
-
-  struct ChangeMapItem {
-    RemoteChange remote_change;
-    PendingChangeQueue::iterator position_in_queue;
-
-    ChangeMapItem();
-    ChangeMapItem(const RemoteChange& remote_change,
-                  PendingChangeQueue::iterator position_in_queue);
-    ~ChangeMapItem();
-  };
-
-  // TODO(tzik): Consider using std::pair<base::FilePath, FileType> as the key
-  // below to support directories and custom conflict handling.
-  typedef std::map<base::FilePath::StringType, ChangeMapItem> PathToChangeMap;
-  typedef std::map<GURL, PathToChangeMap> OriginToChangesMap;
-
-  PendingChangeQueue changes_;
-  OriginToChangesMap origin_to_changes_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(RemoteChangeHandler);
-};
-
-}  // namespace sync_file_system
-
-#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_REMOTE_CHANGE_HANDLER_H_