SafeBrowsing: Move enabled_ to base class DB Manager

chrome/browser/safe_browsing/local_database_manager.h

Index: chrome/browser/safe_browsing/local_database_manager.h
diff --git a/chrome/browser/safe_browsing/local_database_manager.h b/chrome/browser/safe_browsing/local_database_manager.h
index 9a27a8e2907a70ead04e8a101d58dc024e178755..c03fff31c3fc4f6ecff16c5f7848c2dc407411ec 100644
--- a/chrome/browser/safe_browsing/local_database_manager.h
+++ b/chrome/browser/safe_browsing/local_database_manager.h
@@ -330,10 +330,6 @@ class LocalSafeBrowsingDatabaseManager
   // Lock used to prevent possible data races due to compiler optimizations.
   mutable base::Lock database_lock_;
 
-  // Whether the service is running. 'enabled_' is used by the
-  // SafeBrowsingDatabaseManager on the IO thread during normal operations.
-  bool enabled_;
-
   // Indicate if download_protection is enabled by command switch
   // so we allow this feature to be exercised.
   bool enable_download_protection_;