fn generate_key_aes(
global: &GlobalScope,
normalized_algorithm: &SubtleAesKeyGenParams,
extractable: bool,
usages: Vec<KeyUsage>,
rng: &DomRefCell<ServoRng>,
alg_name: &str,
allowed_usages: &[KeyUsage],
can_gc: CanGc,
) -> Result<DomRoot<CryptoKey>, Error>