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

components/offline_pages/offline_page_storage_manager.h

Index: components/offline_pages/offline_page_storage_manager.h
diff --git a/components/offline_pages/offline_page_storage_manager.h b/components/offline_pages/offline_page_storage_manager.h
deleted file mode 100644
index 914212d2cd22e41e1b5a25833a76cd62c51e8fe2..0000000000000000000000000000000000000000
--- a/components/offline_pages/offline_page_storage_manager.h
+++ /dev/null
@@ -1,165 +0,0 @@
-// 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_OFFLINE_PAGE_STORAGE_MANAGER_H_
-#define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_STORAGE_MANAGER_H_
-
-#include <stdint.h>
-
-#include <vector>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "components/offline_pages/archive_manager.h"
-#include "components/offline_pages/offline_page_types.h"
-
-namespace base {
-class Clock;
-}  // namespace base
-
-namespace offline_pages {
-
-// Maximum % of total available storage that will be occupied by offline pages
-// before a storage clearup.
-struct constants {
-  static constexpr double kOfflinePageStorageLimit = 0.3;
-  // The target % of storage usage we try to reach below when expiring pages.
-  static constexpr double kOfflinePageStorageClearThreshold = 0.1;
-  // The time that the storage cleanup will be triggered again since the last
-  // one.
-  static constexpr base::TimeDelta kClearStorageInterval =
-      base::TimeDelta::FromMinutes(10);
-  // The time that the page record will be removed from the store since the page
-  // has been expired.
-  static constexpr base::TimeDelta kRemovePageItemInterval =
-      base::TimeDelta::FromDays(21);
-};
-
-class ClientPolicyController;
-class OfflinePageModel;
-
-// This class is used for storage management of offline pages. It provides
-// a ClearPagesIfNeeded method which is used to clear expired offline pages
-// based on last_access_time and lifetime policy of its namespace.
-// It has its own throttle mechanism so calling the method would not be
-// guaranteed to clear the pages immediately.
-//
-// OfflinePageModel should own and control the lifecycle of this manager.
-// And this manager would use OfflinePageModel to get/remove pages.
-class OfflinePageStorageManager {
- public:
-  enum class ClearStorageResult {
-    SUCCESS,                     // Cleared successfully.
-    UNNECESSARY,                 // No expired pages.
-    EXPIRE_FAILURE,              // Expiration failed.
-    DELETE_FAILURE,              // Deletion failed.
-    EXPIRE_AND_DELETE_FAILURES,  // Both expiration and deletion failed.
-    // NOTE: always keep this entry at the end. Add new result types only
-    // immediately above this line. Make sure to update the corresponding
-    // histogram enum accordingly.
-    RESULT_COUNT,
-  };
-
-  // Callback used when calling ClearPagesIfNeeded.
-  // size_t: the number of expired pages.
-  // ClearStorageResult: result of expiring pages in storage.
-  typedef base::Callback<void(size_t, ClearStorageResult)> ClearStorageCallback;
-
-  explicit OfflinePageStorageManager(OfflinePageModel* model,
-                                     ClientPolicyController* policy_controller,
-                                     ArchiveManager* archive_manager);
-
-  ~OfflinePageStorageManager();
-
-  // The manager would *try* to clear pages when called. It may not delete any
-  // pages (if clearing condition wasn't satisfied).
-  // It clears the storage (expire pages) when it's using more disk space than a
-  // certain limit, or the time elapsed from last time clearing is longer than a
-  // certain interval. Both values are defined above.
-  void ClearPagesIfNeeded(const ClearStorageCallback& callback);
-
-  // Sets the clock for testing.
-  void SetClockForTesting(std::unique_ptr<base::Clock> clock);
-
- private:
-  // Enum indicating how to clear the pages.
-  enum class ClearMode {
-    // Using normal expiration logic to expire pages. Will reduce the storage
-    // usage down below the threshold.
-    DEFAULT,
-    // No need to expire any page (no pages in the model or no expired
-    // pages and we're not exceeding the storage limit.)
-    NOT_NEEDED,
-  };
-
-  // Callback called after getting storage stats from archive manager.
-  void OnGetStorageStatsDoneForClearingPages(
-      const ClearStorageCallback& callback,
-      const ArchiveManager::StorageStats& pages);
-
-  // Callback called after getting all pages from model.
-  void OnGetAllPagesDoneForClearingPages(
-      const ClearStorageCallback& callback,
-      const ArchiveManager::StorageStats& storage_stats,
-      const MultipleOfflinePageItemResult& pages);
-
-  // Callback called after expired pages have been deleted.
-  void OnPagesExpired(const ClearStorageCallback& callback,
-                      size_t pages_to_clear,
-                      const std::vector<int64_t>& page_ids_to_remove,
-                      bool expiration_succeeded);
-
-  // Callback called after clearing outdated pages from model.
-  void OnOutdatedPagesCleared(const ClearStorageCallback& callback,
-                              size_t pages_cleared,
-                              bool expiration_succeeded,
-                              DeletePageResult result);
-
-  // Gets offline IDs of both pages that should be expired and the ones that
-  // need to be removed from metadata store. |page_ids_to_expire| will have
-  // the pages to be expired, |page_ids_to_remove| will have the pages to be
-  // removed.
-  void GetPageIdsToClear(const MultipleOfflinePageItemResult& pages,
-                         const ArchiveManager::StorageStats& stats,
-                         std::vector<int64_t>* page_ids_to_expire,
-                         std::vector<int64_t>* page_ids_to_remove);
-
-  // Determines if manager should clear pages.
-  ClearMode ShouldClearPages(const ArchiveManager::StorageStats& storage_stats);
-
-  // Returns true if |page| is expired comparing to |clear_time_|.
-  bool ShouldBeExpired(const OfflinePageItem& page) const;
-
-  // Returns true if we're currently doing a cleanup.
-  bool IsInProgress() const;
-
-  // Not owned.
-  OfflinePageModel* model_;
-
-  // Not owned.
-  ClientPolicyController* policy_controller_;
-
-  // Not owned.
-  ArchiveManager* archive_manager_;
-
-  // Starting time of the current storage cleanup. If this time is later than
-  // |last_clear_time_| it means we're doing a cleanup.
-  base::Time clear_time_;
-
-  // Timestamp of last storage cleanup.
-  base::Time last_clear_time_;
-
-  // Clock for getting time.
-  std::unique_ptr<base::Clock> clock_;
-
-  base::WeakPtrFactory<OfflinePageStorageManager> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(OfflinePageStorageManager);
-};
-
-}  // namespace offline_pages
-
-#endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_STORAGE_MANAGER_H_