[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>
@@ skipping 56 matching lines @@
                          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 IsPageExpired(const base::Time& now, const OfflinePageItem& page);
 
   // Not owned.
   Client* client_;
 
   // Not owned.
   ClientPolicyController* policy_controller_;
 
   bool in_progress_;
 
   base::WeakPtrFactory<OfflinePageStorageManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageStorageManager);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_STORAGE_MANAGER_H_