Move all components/offline_pages/ files into component/offline_pages/core

components/offline_pages/background/request_queue_store_sql.h

-// Copyright 2016 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 COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_QUEUE_STORE_SQL_H_
-#define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_QUEUE_STORE_SQL_H_
-
-#include <stdint.h>
-#include <memory>
-#include <vector>
-
-#include "base/files/file_path.h"
-#include "base/memory/weak_ptr.h"
-#include "components/offline_pages/background/request_queue_store.h"
-
-namespace base {
-class SequencedTaskRunner;
-}
-
-namespace sql {
-class Connection;
-}
-
-namespace offline_pages {
-
-// SQLite implementation of RequestQueueStore.
-class RequestQueueStoreSQL : public RequestQueueStore {
- public:
-  RequestQueueStoreSQL(
-      scoped_refptr<base::SequencedTaskRunner> background_task_runner,
-      const base::FilePath& database_dir);
-  ~RequestQueueStoreSQL() override;
-
-  // RequestQueueStore implementation.
-  void Initialize(const InitializeCallback& callback) override;
-  void GetRequests(const GetRequestsCallback& callback) override;
-  // Note: current implementation of this method makes a SQL query per ID. This
-  // is OK as long as number of IDs stays low, which is a typical case.
-  // Implementation should be revisited in case that presumption changes.
-  void GetRequestsByIds(const std::vector<int64_t>& request_ids,
-                        const UpdateCallback& callback) override;
-  void AddRequest(const SavePageRequest& offline_page,
-                  const AddCallback& callback) override;
-  void UpdateRequests(const std::vector<SavePageRequest>& requests,
-                      const UpdateCallback& callback) override;
-  void RemoveRequests(const std::vector<int64_t>& request_ids,
-                      const UpdateCallback& callback) override;
-  void Reset(const ResetCallback& callback) override;
-  StoreState state() const override;
-
- private:
-  // Used to finalize DB connection initialization.
-  void OnOpenConnectionDone(const InitializeCallback& callback, bool success);
-
-  // Used to finalize DB connection reset.
-  void OnResetDone(const ResetCallback& callback, bool success);
-
-  // Helper function to return immediately if no database is found.
-  bool CheckDb() const;
-
-  // Background thread where all SQL access should be run.
-  scoped_refptr<base::SequencedTaskRunner> background_task_runner_;
-
-  // Path to the database on disk.
-  base::FilePath db_file_path_;
-
-  // Database connection.
-  std::unique_ptr<sql::Connection> db_;
-
-  // State of the store.
-  StoreState state_;
-
-  base::WeakPtrFactory<RequestQueueStoreSQL> weak_ptr_factory_;
-  DISALLOW_COPY_AND_ASSIGN(RequestQueueStoreSQL);
-};
-
-}  // namespace offline_pages
-
-#endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_QUEUE_STORE_SQL_H_