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

components/offline_pages/background/update_request_task.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_UPDATE_REQUEST_TASK_H_
-#define COMPONENTS_OFFLINE_PAGES_BACKGROUND_UPDATE_REQUEST_TASK_H_
-
-#include <stdint.h>
-
-#include <memory>
-
-#include "base/memory/weak_ptr.h"
-#include "components/offline_pages/background/request_queue_store.h"
-#include "components/offline_pages/core/task.h"
-
-namespace offline_pages {
-
-// Base class for update requests that only work on a single save page request.
-// Derived classes should implement appropriate functionality by overloading
-// |UpdateRequestImpl| method.
-class UpdateRequestTask : public Task {
- public:
-  UpdateRequestTask(RequestQueueStore* store,
-                    int64_t request_id,
-                    const RequestQueueStore::UpdateCallback& callback);
-  ~UpdateRequestTask() override;
-
-  // TaskQueue::Task implementation.
-  void Run() override;
-
- protected:
-  // Step 1. Reading the requests.
-  void ReadRequest();
-  // Step 2. Work is done in the implementation step.
-  virtual void UpdateRequestImpl(
-      std::unique_ptr<UpdateRequestsResult> result) = 0;
-  // Step 3. Completes once update is done.
-  void CompleteWithResult(std::unique_ptr<UpdateRequestsResult> result);
-
-  // Function to uniformly validate read request call for store errors and
-  // presence of the request.
-  bool ValidateReadResult(UpdateRequestsResult* result);
-
-  RequestQueueStore* store() const { return store_; }
-
-  int64_t request_id() const { return request_id_; }
-
-  base::WeakPtr<UpdateRequestTask> GetWeakPtr() {
-    return weak_ptr_factory_.GetWeakPtr();
-  }
-
- private:
-  // Store that this task updates. Not owned.
-  RequestQueueStore* store_;
-  // Request ID of the request to be started.
-  int64_t request_id_;
-  // Callback to complete the task.
-  RequestQueueStore::UpdateCallback callback_;
-
-  base::WeakPtrFactory<UpdateRequestTask> weak_ptr_factory_;
-  DISALLOW_COPY_AND_ASSIGN(UpdateRequestTask);
-};
-
-}  // namespace offline_pages
-
-#endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_UPDATE_REQUEST_TASK_H_