GitLab

https://crrev.com/c/1570217 changed navigator.xr.requestSession()
to take a XRSessionMode as an argument instead of XRSessionCreationOptions.
While it changed the argument type in WPT tests, the parameter/argument
names weren't changed. This CL fixes the names by renaming them from
'option' to 'mode'.

Bug: 953450
Change-Id: If50536b8580bf87ecfc72c874a226124097d28cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1593734
Commit-Queue: Suman Kancherla <sumankancherla@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#656974}