root/chrome/browser/custom_handlers/

1. protocol_handler_registry.cc
2. protocol_handler_registry.h
3. protocol_handler_registry_browsertest.cc
4. protocol_handler_registry_factory.cc
5. protocol_handler_registry_factory.h
6. protocol_handler_registry_unittest.cc
7. register_protocol_handler_infobar_delegate.cc
8. register_protocol_handler_infobar_delegate.h
9. register_protocol_handler_permission_request.cc
10. register_protocol_handler_permission_request.h