Merge the hash prefixes from the old store and the additions in the partial

components/safe_browsing_db/v4_database_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/debug/leak_annotations.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/test/test_simple_task_runner.h"
@@ skipping 115 matching lines @@
     v4_database_ = std::move(v4_database);
   }
 
   std::unique_ptr<ParsedServerResponse> CreateFakeServerResponse(
       StoreStateMap store_state_map) {
     std::unique_ptr<ParsedServerResponse> parsed_server_response(
         new ParsedServerResponse);
     for (const auto& store_state_iter : store_state_map) {
       UpdateListIdentifier identifier = store_state_iter.first;
       ListUpdateResponse* list_update_response = new ListUpdateResponse;
+      list_update_response->set_response_type(ListUpdateResponse::FULL_UPDATE);
       list_update_response->set_platform_type(identifier.platform_type);
       list_update_response->set_threat_entry_type(identifier.threat_entry_type);
       list_update_response->set_threat_type(identifier.threat_type);
       list_update_response->set_new_client_state(store_state_iter.second);
       parsed_server_response->push_back(base::WrapUnique(list_update_response));
     }
     return parsed_server_response;
   }
 
   void VerifyExpectedStoresState(bool expect_new_stores) {
@@ skipping 156 matching lines @@
   v4_database_->ApplyUpdate(std::move(parsed_server_response),
                             callback_db_updated_);
 
   task_runner_->RunPendingTasks();
   base::RunLoop().RunUntilIdle();
 
   VerifyExpectedStoresState(false);
 }
 
 }  // namespace safe_browsing