GitLab

This CL removes unused NonModalAlertCoordinator,
NonModalAlertTouchForwarder and NonModalAlertPresentationUpdater.

Change-Id: Icb676ce2e1b8a057f30b55336204ab5654d9b6f6
Bug: 1065878, 1029346
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2128486
Commit-Queue: Nazerke Kalidolda <nazerke@google.com>
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#754845}