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

components/offline_pages/background/request_queue_store.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_H_
-#define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_QUEUE_STORE_H_
-
-#include <stdint.h>
-#include <vector>
-
-#include "base/callback.h"
-#include "components/offline_pages/background/request_queue.h"
-#include "components/offline_pages/background/save_page_request.h"
-#include "components/offline_pages/offline_store_types.h"
-
-namespace offline_pages {
-
-// Interface for classes storing save page requests.
-class RequestQueueStore {
- public:
-  enum class UpdateStatus {
-    ADDED,    // Request was added successfully.
-    UPDATED,  // Request was updated successfully.
-    FAILED,   // Add or update attempt failed.
-  };
-
-  using UpdateCallback = RequestQueue::UpdateCallback;
-
-  typedef base::Callback<void(
-      bool /* success */,
-      std::vector<std::unique_ptr<SavePageRequest>> /* requests */)>
-      GetRequestsCallback;
-  typedef base::Callback<void(ItemActionStatus)> AddCallback;
-  typedef base::Callback<void(bool /* success */)> ResetCallback;
-
-  virtual ~RequestQueueStore(){};
-
-  // Gets all of the requests from the store.
-  virtual void GetRequests(const GetRequestsCallback& callback) = 0;
-
-  // Gets requests with specified IDs from the store. UpdateCallback is used
-  // instead of GetRequestsCallback to indicate which requests where not found.
-  virtual void GetRequestsByIds(const std::vector<int64_t>& request_ids,
-                                const UpdateCallback& callback) = 0;
-
-  // Asynchronously adds request in store. Fails if request with the same
-  // offline ID already exists.
-  virtual void AddRequest(const SavePageRequest& offline_page,
-                          const AddCallback& callback) = 0;
-
-  // Asynchronously updates requests in store.
-  virtual void UpdateRequests(const std::vector<SavePageRequest>& requests,
-                              const UpdateCallback& callback) = 0;
-
-  // Asynchronously removes requests from the store using their IDs.
-  // Result of the update, and a number of removed pages is passed in the
-  // callback.
-  // Result of remove should be false, when one of the provided items couldn't
-  // be deleted, e.g. because it was missing.
-  virtual void RemoveRequests(const std::vector<int64_t>& request_ids,
-                              const UpdateCallback& callback) = 0;
-
-  // Resets the store.
-  virtual void Reset(const ResetCallback& callback) = 0;
-
-  // Gets the store state.
-  virtual StoreState state() const = 0;
-};
-
-}  // namespace offline_pages
-
-#endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_QUEUE_STORE_H_