omrilio@ please triage

Sammie, can you take a look? 

+oshima

I think minimized windows always did not resize properly on rotation. But now there are artifacts instead of all black.

oshima any ideas?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2a92c1111bdaf14ac61c4d2cf6f6d3723449acf3

commit 2a92c1111bdaf14ac61c4d2cf6f6d3723449acf3
Author: Sammie Quon <sammiequon@google.com>
Date: Thu May 17 15:41:51 2018

overview: Shield widget bounds now correct after rotation.

Shield widget gets updated in PositionWindows, which has an early out if
no windows. Move update before early return.

Also fix a big with the no recents message not disappearing if an window
item is added back to the grid via split view.

Test: manual
Bug:  842395 ,  842394 
Change-Id: I52dcdf9c012edc32c7d47bbdd978b6f59376a289
Reviewed-on: https://chromium-review.googlesource.com/1063171
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559545}
[modify] https://crrev.com/2a92c1111bdaf14ac61c4d2cf6f6d3723449acf3/ash/wm/overview/window_grid.cc
[modify] https://crrev.com/2a92c1111bdaf14ac61c4d2cf6f6d3723449acf3/ash/wm/overview/window_selector.cc
[modify] https://crrev.com/2a92c1111bdaf14ac61c4d2cf6f6d3723449acf3/ash/wm/overview/window_selector.h

whoops

#4 - does not actually fix the bug, but it does remove the "No recents" label which should not be shown in this case.

Re #3, not sure why, but it does get resized properly but gets corrupted sometimes. It's using mirror view so i'd check if something has changed
or check if it's gets properly mirrored.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9929f29f00807cb472b72080a71399bf8379e54e

commit 9929f29f00807cb472b72080a71399bf8379e54e
Author: Sammie Quon <sammiequon@google.com>
Date: Wed Jun 20 23:54:01 2018

overview: Fix corrupt minimized mirror views after rotation.

Test: manual
Bug:  842394 
Change-Id: Iaf1bb8bb94da5b6d2e60009a21b02bde894f1326
Reviewed-on: https://chromium-review.googlesource.com/1105196
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569092}
[modify] https://crrev.com/9929f29f00807cb472b72080a71399bf8379e54e/ash/wm/overview/scoped_transform_overview_window.cc
[modify] https://crrev.com/9929f29f00807cb472b72080a71399bf8379e54e/ash/wm/overview/scoped_transform_overview_window.h
[modify] https://crrev.com/9929f29f00807cb472b72080a71399bf8379e54e/ash/wm/overview/window_selector_item.cc
[modify] https://crrev.com/9929f29f00807cb472b72080a71399bf8379e54e/ash/wm/overview/window_selector_item.h
[modify] https://crrev.com/9929f29f00807cb472b72080a71399bf8379e54e/ash/wm/window_mirror_view.cc
[modify] https://crrev.com/9929f29f00807cb472b72080a71399bf8379e54e/ash/wm/window_mirror_view.h

Issue still not fixed, the window disappears after minimizing in split view instead of falling back to overview. Even 'No recent items' message vanishes.
Tested on M69 (10836.0.0, 69.0.3479.0).

Where as original issue still exist on M67 & M68.

I did the exact steps and I don't see any artifacts. The message is rightfully gone.

Closing as per comment #10