[Offline Pages] Adding more expiration logic.

components/offline_pages/offline_page_storage_manager.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_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 "components/offline_pages/offline_page_types.h"
 
+namespace base {
+class Clock;
+}
+
 namespace offline_pages {
 
 class ClientPolicyController;
 
 // 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.
 //
@@ skipping 22 matching lines @@
 
   explicit OfflinePageStorageManager(Client* client,
                                      ClientPolicyController* policy_controller);
 
   ~OfflinePageStorageManager();
 
   // The manager would *try* to clear pages when called. It may not delete any
   // pages (if clearing condition wasn't satisfied).
   void ClearPagesIfNeeded(const ClearPageCallback& callback);
 
+  // Sets the clock for testing.
+  void SetClockForTesting(std::unique_ptr<base::Clock> clock);
+
  private:
   // Selects and removes pages that need to be expired. Triggered as a callback
   // to |GetAllPages|.
   void ClearExpiredPages(const ClearPageCallback& callback,
                          const MultipleOfflinePageItemResult& pages);
 
   // Gets offline IDs of all expired pages and return in |offline_ids|.
   void GetExpiredPageIds(const MultipleOfflinePageItemResult& pages,
                          std::vector<int64_t>& offline_ids);
 
   // Callback when expired pages has been deleted.
   void OnExpiredPagesDeleted(const ClearPageCallback& callback,
                              int pages_to_clear,
                              DeletePageResult result);
 
   // Determine if manager should clear pages.
   bool ShouldClearPages();
 
-  // Return true if |page| is expired.
-  bool IsPageExpired(const OfflinePageItem& page);
+  // Return true if |page| is expired comparing to |now|.
+  bool ShouldBeExpired(const base::Time& now, const OfflinePageItem& page);
 
   // Not owned.
   Client* client_;
 
   // Not owned.
   ClientPolicyController* policy_controller_;
 
   bool in_progress_;
 
+  // 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_