root/chrome/browser/ui/extensions/

[..]
  1. application_launch.cc
  2. application_launch.h
  3. extension_enable_flow.cc
  4. extension_enable_flow.h
  5. extension_enable_flow_delegate.h
  6. extension_install_ui_default.cc
  7. extension_install_ui_default.h
  8. extension_installed_bubble.cc
  9. extension_installed_bubble.h
[..]