[Sync] Initial USS service implementation for DeviceInfo.

components/sync_driver/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")
 
 source_set("sync_driver") {
   sources = [
     "about_sync_util.cc",
     "about_sync_util.h",
@@ skipping 14 matching lines @@
     "data_type_manager.h",
     "data_type_manager_impl.cc",
     "data_type_manager_impl.h",
     "data_type_manager_observer.h",
     "data_type_status_table.cc",
     "data_type_status_table.h",
     "device_info.cc",
     "device_info.h",
     "device_info_data_type_controller.cc",
     "device_info_data_type_controller.h",
+    "device_info_service.cc",
+    "device_info_service.h",
     "device_info_sync_service.cc",
     "device_info_sync_service.h",
     "device_info_tracker.h",
     "directory_data_type_controller.cc",
     "directory_data_type_controller.h",
     "favicon_cache.cc",
     "favicon_cache.h",
     "frontend_data_type_controller.cc",
     "frontend_data_type_controller.h",
     "generic_change_processor.cc",
@@ skipping 150 matching lines @@
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "about_sync_util_unittest.cc",
     "backup_rollback_controller_unittest.cc",
     "data_type_manager_impl_unittest.cc",
     "device_info_data_type_controller_unittest.cc",
+    "device_info_service_unittest.cc",
     "device_info_sync_service_unittest.cc",
     "favicon_cache_unittest.cc",
     "generic_change_processor_unittest.cc",
     "model_association_manager_unittest.cc",
     "non_blocking_data_type_controller_unittest.cc",
     "non_ui_data_type_controller_unittest.cc",
     "shared_change_processor_unittest.cc",
     "sync_prefs_unittest.cc",
     "sync_stopped_reporter_unittest.cc",
     "sync_util_unittest.cc",
     "system_encryptor_unittest.cc",
     "tab_node_pool_unittest.cc",
     "ui_data_type_controller_unittest.cc",
   ]
   deps = [
     ":test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 
   if (enable_configuration_policy) {
     sources += [ "sync_policy_handler_unittest.cc" ]
   }
 }