Issue 838051  has been merged into this issue.

MacViews triage: punting cleanup work to M70.

secondary-ui-md was removed in https://chromium-review.googlesource.com/c/chromium/src/+/1162901 but we should kill #show-all-dialogs-with-views-toolkit too

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7ae5f4bf5ed54f600b82e13be6f32c24872096c0

commit 7ae5f4bf5ed54f600b82e13be6f32c24872096c0
Author: Leonard Grey <lgrey@chromium.org>
Date: Wed Aug 22 16:49:05 2018

Mac: Remove Cocoa GlobalErrorBubble

Bug:  838119 
Change-Id: Id2821c2e0fe8cdabc2cfa8d239656835be34c0ba
Reviewed-on: https://chromium-review.googlesource.com/1181872
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Leonard Grey <lgrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585084}
[modify] https://crrev.com/7ae5f4bf5ed54f600b82e13be6f32c24872096c0/chrome/app/nibs/BUILD.gn
[delete] https://crrev.com/0d3824d5abfb6ea8a57928b7ec11152a499307a2/chrome/app/nibs/GlobalErrorBubble.xib
[modify] https://crrev.com/7ae5f4bf5ed54f600b82e13be6f32c24872096c0/chrome/browser/ui/BUILD.gn
[delete] https://crrev.com/0d3824d5abfb6ea8a57928b7ec11152a499307a2/chrome/browser/ui/cocoa/global_error_bubble_controller.h
[delete] https://crrev.com/0d3824d5abfb6ea8a57928b7ec11152a499307a2/chrome/browser/ui/cocoa/global_error_bubble_controller.mm
[delete] https://crrev.com/0d3824d5abfb6ea8a57928b7ec11152a499307a2/chrome/browser/ui/cocoa/global_error_bubble_controller_views.mm
[modify] https://crrev.com/7ae5f4bf5ed54f600b82e13be6f32c24872096c0/chrome/browser/ui/views/global_error_bubble_view.cc

Able to reproduce the issue on chrome version 68.0.3421.0 (build without fix) as per the comment #0
Verified the fix on Mac 10.13.6 using Chrome version #70.0.3532.0.
Attaching screen-cast for reference.
Observed that  " removed secondary-UI-md flag " 
The fix is working as expected, adding Verified labels

Thanks...!

Deleted: 838119.mp4 2.0 MB

	838119.mp4 2.0 MB View Download

Opened  Issue 877493  for #show-all-dialogs-with-views-toolkit, closing this one