PVer4: Test checksum on startup outside the hotpath of DB load

components/safe_browsing_db/v4_local_database_manager.h

Index: components/safe_browsing_db/v4_local_database_manager.h
diff --git a/components/safe_browsing_db/v4_local_database_manager.h b/components/safe_browsing_db/v4_local_database_manager.h
index c73db1b97164ae41238b5861db9cb214b0ce7bc3..6b9a997226d87cb4ea9fa702e746cb1abe0a3e07 100644
--- a/components/safe_browsing_db/v4_local_database_manager.h
+++ b/components/safe_browsing_db/v4_local_database_manager.h
@@ -134,8 +134,15 @@ class V4LocalDatabaseManager : public SafeBrowsingDatabaseManager {
   ~V4LocalDatabaseManager() override;
 
   // Called when all the stores managed by the database have been read from
-  // disk after startup and the database is ready for use.
-  void DatabaseReady(std::unique_ptr<V4Database> v4_database);
+  // disk after startup and the database is ready for checking resource
+  // reputation.
+  void DatabaseReadyForChecks(std::unique_ptr<V4Database> v4_database);
+
+  // Called when all the stores managed by the database have been verified for
+  // checksum correctness after startup and the database is ready for applying
+  // updates.
+  void DatabaseReadyForUpdates(
+      const std::vector<ListIdentifier>& stores_to_reset);
 
   // Called when the database has been updated and schedules the next update.
   void DatabaseUpdated();