SafeBrowsing: Move enabled_ to base class DB Manager

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 7db100dc4cee05563c71ce38dd0e76138554f3af..12d63a8bd5b3301017301e94f3b2461ec079e67e 100644
--- a/components/safe_browsing_db/v4_local_database_manager.h
+++ b/components/safe_browsing_db/v4_local_database_manager.h
@@ -265,9 +265,6 @@ class V4LocalDatabaseManager : public SafeBrowsingDatabaseManager {
   // ready to process next update.
   DatabaseUpdatedCallback db_updated_callback_;
 
-  // Whether the service is running.
-  bool enabled_;
-
   // The list of stores to manage (for hash prefixes and full hashes). Each
   // element contains the identifier for the store, the corresponding
   // SBThreatType, whether to fetch hash prefixes for that store, and the