[webauthn] What does normalizedParameters actually contain in makeCredential?

bzbarsky has just created a new issue for 
https://github.com/w3c/webauthn:

== What does normalizedParameters actually contain in makeCredential? 
==
The spec says:

> Add a new object of type ScopedCredentialParameters to 
normalizedParameters, with type set to current.type and algorithm set 
to normalizedAlgorithm.

But "normalizedAlgorithm" is an IDL dictionary, while the `algorithm` 
member of a `ScopedCredentialParameters` dictionary is a `(DOMString 
or object)`.  Is the intention that "normalizedAlgorithm" is converted
 to an ES object using 
<https://heycam.github.io/webidl/#dictionary-to-es>?  Is the intention
 that normalizedParameters be a list of (type, algorithm) pairs where 
the algorithm is an IDL dictionary?  Something else?

Please view or discuss this issue at 
https://github.com/w3c/webauthn/issues/265 using your GitHub account