Revert of Browser tests for using the new SafeBrowsing protocol (v4)

components/safe_browsing_db/v4_local_database_manager.cc

Index: components/safe_browsing_db/v4_local_database_manager.cc
diff --git a/components/safe_browsing_db/v4_local_database_manager.cc b/components/safe_browsing_db/v4_local_database_manager.cc
index 7e3f70046415a3d2861b5c61b1a80c17e5c3f235..bed076fa0b605a410e678ba259c90dcaefc388c6 100644
--- a/components/safe_browsing_db/v4_local_database_manager.cc
+++ b/components/safe_browsing_db/v4_local_database_manager.cc
@@ -133,6 +133,10 @@
 scoped_refptr<V4LocalDatabaseManager> V4LocalDatabaseManager::Create(
     const base::FilePath& base_path,
     ExtendedReportingLevelCallback extended_reporting_level_callback) {
+  if (!V4FeatureList::IsLocalDatabaseManagerEnabled()) {
+    return nullptr;
+  }
+
   return make_scoped_refptr(
       new V4LocalDatabaseManager(base_path, extended_reporting_level_callback));
 }