| // Copyright 2017 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_UKM_OBSERVERS_HISTORY_DELETE_OBSERVER_H_ |
| #define COMPONENTS_UKM_OBSERVERS_HISTORY_DELETE_OBSERVER_H_ |
| |
| #include <set> |
| |
| #include "base/scoped_observer.h" |
| #include "components/history/core/browser/history_service_observer.h" |
| |
| namespace ukm { |
| |
| // Observes multiple HistoryService objects for any events that delete history. |
| // Handles cleanup and removing observers as objects are destroyed. |
| class HistoryDeleteObserver : public history::HistoryServiceObserver { |
| public: |
| HistoryDeleteObserver(); |
| ~HistoryDeleteObserver() override; |
| |
| // Starts observing a service for history deletions. |
| void ObserveServiceForDeletions(history::HistoryService* history_service); |
| |
| // history::HistoryServiceObserver |
| void OnURLsDeleted(history::HistoryService* history_service, |
| const history::DeletionInfo& deletion_info) override; |
| void HistoryServiceBeingDeleted( |
| history::HistoryService* history_service) override; |
| |
| protected: |
| virtual void OnHistoryDeleted() = 0; |
| |
| private: |
| // Tracks observed history services, for cleanup. |
| ScopedObserver<history::HistoryService, history::HistoryServiceObserver> |
| history_observer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HistoryDeleteObserver); |
| }; |
| |
| } // namespace ukm |
| |
| #endif // COMPONENTS_UKM_OBSERVERS_HISTORY_DELETE_OBSERVER_H_ |