Modify sync unit test to use standard sql::test:: helper.

components/sync/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/features.gni")
 import("//components/sync/protocol/protocol_sources.gni")
 import("//testing/test.gni")
 
 static_library("sync") {
@@ skipping 641 matching lines @@
     "engine_impl/cycle/mock_debug_info_getter.cc",
     "engine_impl/cycle/mock_debug_info_getter.h",
     "engine_impl/cycle/test_util.cc",
     "engine_impl/cycle/test_util.h",
     "engine_impl/sync_manager_for_profile_sync_test.cc",
     "engine_impl/sync_manager_for_profile_sync_test.h",
     "engine_impl/test_entry_factory.cc",
     "engine_impl/test_entry_factory.h",
     "syncable/test_user_share.cc",
     "syncable/test_user_share.h",
-    "test/directory_backing_store_corruption_testing.cc",
-    "test/directory_backing_store_corruption_testing.h",
     "test/engine/fake_model_worker.cc",
     "test/engine/fake_model_worker.h",
     "test/engine/fake_sync_scheduler.cc",
     "test/engine/fake_sync_scheduler.h",
     "test/engine/mock_connection_manager.cc",
     "test/engine/mock_connection_manager.h",
     "test/engine/mock_model_type_processor.cc",
     "test/engine/mock_model_type_processor.h",
     "test/engine/mock_model_type_worker.cc",
     "test/engine/mock_model_type_worker.h",
@@ skipping 421 matching lines @@
     deps = [
       ":fake_server_jni",
       ":sync",
       ":test_support_fake_server",
       "//base",
       "//testing/gtest",
       "//url:url",
     ]
   }
 }