Remove redundant Role::kPresentation/kIgnored (use kNone)

Also fixes an actual bug, where the computed role for 'none' was
capitalized as 'None'.

Bug: None
Change-Id: I344ee1b5d018dac8d92f69bfcacc04631e1172e1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2828456
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Shengfa Lin <shengfa@google.com>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#874502}
GitOrigin-RevId: 609f569cd5f252cca7c95842bc6fbede77b571d7
1 file changed