The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/397fe70fe94675f82c521d54374d79747465d2c7

commit 397fe70fe94675f82c521d54374d79747465d2c7
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Fri Jul 14 05:47:19 2017

Remember the target rotation when entering the tablet mode

New animation first makes copies of screen, and chagnes
the rotation after these copies are made. If a device enters
tablet mode while coyping it may remember the wrong rotation.

BUG= 742605 
TEST=covered by unit tests. Also tested manually:
 1) Start portrait only ARC++ app
 2) Try to close and open the lid multiple times

Change-Id: I835b3409f34f101dac45784eda501635f7fe085e
Reviewed-on: https://chromium-review.googlesource.com/571258
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486687}
[modify] https://crrev.com/397fe70fe94675f82c521d54374d79747465d2c7/ash/display/display_configuration_controller.cc
[modify] https://crrev.com/397fe70fe94675f82c521d54374d79747465d2c7/ash/display/display_configuration_controller.h
[modify] https://crrev.com/397fe70fe94675f82c521d54374d79747465d2c7/ash/display/display_configuration_controller_unittest.cc
[modify] https://crrev.com/397fe70fe94675f82c521d54374d79747465d2c7/ash/display/screen_orientation_controller_chromeos.cc
[modify] https://crrev.com/397fe70fe94675f82c521d54374d79747465d2c7/ash/rotator/screen_rotation_animator.cc
[modify] https://crrev.com/397fe70fe94675f82c521d54374d79747465d2c7/ash/rotator/screen_rotation_animator.h
[modify] https://crrev.com/397fe70fe94675f82c521d54374d79747465d2c7/ash/rotator/screen_rotation_animator_unittest.cc

This bug requires manual review: We are only 10 days from stable.
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), josafat@(ChromeOS), bustamante@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7e9ff0d0051f2a358d1f4f46b111fa101463bfcd

commit 7e9ff0d0051f2a358d1f4f46b111fa101463bfcd
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Tue Jul 18 21:23:16 2017

Remember the target rotation when entering the tablet mode

New animation first makes copies of screen, and chagnes
the rotation after these copies are made. If a device enters
tablet mode while coyping it may remember the wrong rotation.

BUG= 742605 
TEST=covered by unit tests. Also tested manually:
 1) Start portrait only ARC++ app
 2) Try to close and open the lid multiple times

(cherry picked from commit 397fe70fe94675f82c521d54374d79747465d2c7)

Reviewed-on: https://chromium-review.googlesource.com/571258
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#486687}
Change-Id: Ia4799c81b6bf206c9075977916fd087f55135479
Reviewed-on: https://chromium-review.googlesource.com/576469
Cr-Commit-Position: refs/branch-heads/3112@{#641}
Cr-Branched-From: b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
[modify] https://crrev.com/7e9ff0d0051f2a358d1f4f46b111fa101463bfcd/ash/display/display_configuration_controller.cc
[modify] https://crrev.com/7e9ff0d0051f2a358d1f4f46b111fa101463bfcd/ash/display/display_configuration_controller.h
[modify] https://crrev.com/7e9ff0d0051f2a358d1f4f46b111fa101463bfcd/ash/display/display_configuration_controller_unittest.cc
[modify] https://crrev.com/7e9ff0d0051f2a358d1f4f46b111fa101463bfcd/ash/display/screen_orientation_controller_chromeos.cc
[modify] https://crrev.com/7e9ff0d0051f2a358d1f4f46b111fa101463bfcd/ash/rotator/screen_rotation_animator.cc
[modify] https://crrev.com/7e9ff0d0051f2a358d1f4f46b111fa101463bfcd/ash/rotator/screen_rotation_animator.h
[modify] https://crrev.com/7e9ff0d0051f2a358d1f4f46b111fa101463bfcd/ash/rotator/screen_rotation_animator_unittest.cc

Verified on M60 build 9592.71.0