root/chrome/browser/extensions/api/signed_in_devices/

1. id_mapping_helper.cc
2. id_mapping_helper.h
3. id_mapping_helper_unittest.cc
4. signed_in_devices_api.cc
5. signed_in_devices_api.h
6. signed_in_devices_api_unittest.cc
7. signed_in_devices_manager.cc
8. signed_in_devices_manager.h
9. signed_in_devices_manager_unittest.cc