[Sync] Implementation of ModelTypeStoreBackend

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/config/features.gni")
 import("//testing/test.gni")
 
 component("sync") {
   public_deps = [
     ":sync_core",
@@ skipping 623 matching lines @@
     "internal_api/attachments/fake_attachment_downloader_unittest.cc",
     "internal_api/attachments/fake_attachment_uploader_unittest.cc",
     "internal_api/attachments/in_memory_attachment_store_unittest.cc",
     "internal_api/attachments/on_disk_attachment_store_unittest.cc",
     "internal_api/attachments/task_queue_unittest.cc",
     "internal_api/debug_info_event_listener_unittest.cc",
     "internal_api/http_bridge_unittest.cc",
     "internal_api/js_mutation_event_observer_unittest.cc",
     "internal_api/js_sync_encryption_handler_observer_unittest.cc",
     "internal_api/js_sync_manager_observer_unittest.cc",
+    "internal_api/model_type_store_backend_unittest.cc",
     "internal_api/model_type_store_impl_unittest.cc",
     "internal_api/protocol_event_buffer_unittest.cc",
     "internal_api/public/base/attachment_id_proto_unittest.cc",
     "internal_api/public/base/cancelation_signal_unittest.cc",
     "internal_api/public/base/enum_set_unittest.cc",
     "internal_api/public/base/node_ordinal_unittest.cc",
     "internal_api/public/base/ordinal_unittest.cc",
     "internal_api/public/base/unique_position_unittest.cc",
     "internal_api/public/change_record_unittest.cc",
     "internal_api/public/engine/model_safe_worker_unittest.cc",
@@ skipping 203 matching lines @@
       ":fake_server_jni",
       ":sync_core",
       ":test_support_sync_fake_server",
       "//base",
       "//sync/protocol:protocol",
       "//testing/gtest",
       "//url:url",
     ]
   }
 }