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

components/safe_browsing_db/v4_database_unittest.cc

Index: components/safe_browsing_db/v4_database_unittest.cc
diff --git a/components/safe_browsing_db/v4_database_unittest.cc b/components/safe_browsing_db/v4_database_unittest.cc
index 6b83138a19cafd86536bf5ef227cd9a9b16dece8..b8e0786aedca30413f7d55130aa2ed9137313179 100644
--- a/components/safe_browsing_db/v4_database_unittest.cc
+++ b/components/safe_browsing_db/v4_database_unittest.cc
@@ -91,8 +91,8 @@
   }
 
   void RegisterFactory(bool hash_prefix_matches = true) {
-    V4Database::RegisterStoreFactoryForTest(
-        base::MakeUnique<FakeV4StoreFactory>(hash_prefix_matches));
+    factory_.reset(new FakeV4StoreFactory(hash_prefix_matches));
+    V4Database::RegisterStoreFactoryForTest(factory_.get());
   }
 
   void SetupInfoMapAndExpectedState() {
@@ -206,6 +206,7 @@
   ListInfos list_infos_;
   std::vector<ListIdentifier> expected_identifiers_;
   std::vector<base::FilePath> expected_store_paths_;
+  std::unique_ptr<FakeV4StoreFactory> factory_;
   DatabaseUpdatedCallback callback_db_updated_;
   NewDatabaseReadyCallback callback_db_ready_;
   StoreStateMap expected_store_state_map_;