As described in #542, this switches `requestSession` to a "primary type
+ options bag" pattern. However, since the dictionary only had a single
key after outputContext was moved this change ends up removing the
XRSessionCreationOptions dictionary entirely in favor of just passing in
the type enum directly.
In the future if additional options *are* needed for `requestSession`,
the expected pattern would be:
```
navigator.xr.requestSession('immersive-vr', { option: value });
```

toji mentioned this pull request

Closed