Thanks for filing - I don't think we should wait for everything to be ported either. We should have enough examples to handle all the ways to do this now and should be instead just whitelisting existing examples so we don't regress

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2636351c5580998b06cd0ea6ba41d85702d1add6

commit 2636351c5580998b06cd0ea6ba41d85702d1add6
Author: Amirhossein Simjour <asimjour@chromium.org>
Date: Mon May 28 14:12:28 2018

Presubmit checks to stop AlertDialog.Builder

Presubmit check is added to make sure that no new instance of
AlertDialog is added to the code. All the current instances are
whitelisted. The whitelist must be updated when one of the
existing AlertDialogs is replaced with ModalDialogView.
This is not the only presubmit check that is needed, more presubmit
checks are needed for the rest of the 2D Popups.

Note that previous presubmit check had a minor mistake in its
whitelist. This CL also fixes that issue.

Bug: 841863

Change-Id: I0d5c3a604f1544730c6df0b272a5971f9a00ac21
Reviewed-on: https://chromium-review.googlesource.com/1064553
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Amirhossein Simjour <asimjour@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562255}
[modify] https://crrev.com/2636351c5580998b06cd0ea6ba41d85702d1add6/chrome/android/java/src/PRESUBMIT.py
[modify] https://crrev.com/2636351c5580998b06cd0ea6ba41d85702d1add6/chrome/android/java/src/PRESUBMIT_test.py