root/chrome/browser/extensions/api/system_display/

[..]
  1. display_info_provider.cc
  2. display_info_provider.h
  3. display_info_provider_aura.cc
  4. display_info_provider_chromeos.cc
  5. display_info_provider_chromeos_unittest.cc
  6. display_info_provider_gtk.cc
  7. display_info_provider_mac.cc
  8. display_info_provider_win.cc
  9. system_display_api.cc
  10. system_display_api.h
  11. system_display_apitest.cc
[..]