scoped_ptr<echo_api::GetRegistrationCode::Params> params =
echo_api::GetRegistrationCode::Params::Create(*args_);
EXTENSION_FUNCTION_VALIDATE(params);
scoped_ptr<echo_api::GetRegistrationCode::Params> params =
echo_api::GetRegistrationCode::Params::Create(*args_);
EXTENSION_FUNCTION_VALIDATE(params);