[Offline pages] Resetting offline page metadata store if initial load fails

components/offline_pages/offline_page_model_impl.h

Index: components/offline_pages/offline_page_model_impl.h
diff --git a/components/offline_pages/offline_page_model_impl.h b/components/offline_pages/offline_page_model_impl.h
index 194fa20695a13fdfdb627b243436964920ebc52c..431a33250e8b4f16d7951658a304ef4493b5ac09 100644
--- a/components/offline_pages/offline_page_model_impl.h
+++ b/components/offline_pages/offline_page_model_impl.h
@@ -152,9 +152,15 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
   void CheckMetadataConsistency();
 
   // Callback for loading pages from the offline page metadata store.
-  void OnLoadDone(const base::TimeTicks& start_time,
-                  OfflinePageMetadataStore::LoadStatus load_status,
-                  const std::vector<OfflinePageItem>& offline_pages);
+  void OnGetOfflinePagesDoneForInit(
+      const base::TimeTicks& start_time,
+      StoreState store_state,
+      const std::vector<OfflinePageItem>& offline_pages);
+
+  // Attempts to reset the store.
+  bool MaybeResetStore(const base::TimeTicks& start_time);
+  // Callback for resetting the offline page metadata store.
+  void OnStoreResetDone(const base::TimeTicks& start_time, bool success);
 
   // Steps for saving a page offline.
   void OnCreateArchiveDone(const GURL& requested_url,
@@ -279,6 +285,9 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
   // Logger to facilitate recording of events.
   OfflinePageModelEventLogger offline_event_logger_;
 
+  // Remaining store reset attempts left. (To prevent infinite attempts.)
+  int store_reset_attempts_left_;
+
   // Clock for getting time in testing code. The setter is responsible to reset
   // it once it is not longer needed.
   base::Clock* testing_clock_;