[Offline pages] Resetting offline page metadata store to handle LOAD/INIT failures

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 bb5c972ca66d5eaa75c96dd20af78925cd14d9e0..c4fd2a224ff9a3fc71244e8eed018157159208f7 100644
--- a/components/offline_pages/offline_page_model_impl.h
+++ b/components/offline_pages/offline_page_model_impl.h
@@ -150,9 +150,10 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
   void CheckMetadataConsistency();
 
   // Callback for loading pages from the offline page metadata store.
+  void OnStoreInitialized(const base::TimeTicks& start_time, StoreState state);
   void OnLoadDone(const base::TimeTicks& start_time,
-                  OfflinePageMetadataStore::LoadStatus load_status,
                   const std::vector<OfflinePageItem>& offline_pages);
+  void CompleteLoad();
 
   // Steps for saving a page offline.
   void OnCreateArchiveDone(const GURL& requested_url,