GitLab

This change displays a tab modal dialog seeking the user's consent before
proceeding with an XRSession creation when a website calls requestSession.
If the user allows, execution continues as before but if they don't,
the promise is rejected.

Bug: 958033
Change-Id: I198f91d8dd6a9c1a48c69501e264ab897f0b1322
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1603205
Commit-Queue: Suman Kancherla <sumankancherla@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Emily Stark <estark@chromium.org>
Reviewed-by: Bill Orr <billorr@chromium.org>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659327}