The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4f5b7f72da4ca1534233252c673f9c162bdb25f9

commit 4f5b7f72da4ca1534233252c673f9c162bdb25f9
Author: oshima <oshima@chromium.org>
Date: Wed Apr 05 20:42:16 2017

Resolve current orientation after applying the previous orientation request.

An application may request to lock to portrait (primary/secondary), the
lock to specific orientation by sending CURRENT (no sensor/lock).
Current implement does not support this scenario because it looks to
the current device's orientation even if that orientation was for other apps.

This CL addresses this issue by waiting until the window is activated.

BUG= 708202 
TEST=covered by unit test, plus manual tests using sample app.

Review-Url: https://codereview.chromium.org/2792973002
Cr-Commit-Position: refs/heads/master@{#462206}

[modify] https://crrev.com/4f5b7f72da4ca1534233252c673f9c162bdb25f9/ash/content/screen_orientation_delegate_chromeos.cc
[modify] https://crrev.com/4f5b7f72da4ca1534233252c673f9c162bdb25f9/ash/display/display_manager_unittest.cc
[modify] https://crrev.com/4f5b7f72da4ca1534233252c673f9c162bdb25f9/ash/display/screen_orientation_controller_chromeos.cc
[modify] https://crrev.com/4f5b7f72da4ca1534233252c673f9c162bdb25f9/ash/display/screen_orientation_controller_chromeos.h
[modify] https://crrev.com/4f5b7f72da4ca1534233252c673f9c162bdb25f9/ash/test/screen_orientation_controller_test_api.cc
[modify] https://crrev.com/4f5b7f72da4ca1534233252c673f9c162bdb25f9/ash/test/screen_orientation_controller_test_api.h
[modify] https://crrev.com/4f5b7f72da4ca1534233252c673f9c162bdb25f9/chrome/browser/ui/ash/launcher/arc_app_window_launcher_controller.cc
[modify] https://crrev.com/4f5b7f72da4ca1534233252c673f9c162bdb25f9/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl_unittest.cc

+bhthompson@ we need this for ARC++

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b

commit 7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Sat Apr 08 05:30:22 2017

Resolve current orientation after applying the previous orientation request.

An application may request to lock to portrait (primary/secondary), the
lock to specific orientation by sending CURRENT (no sensor/lock).
Current implement does not support this scenario because it looks to
the current device's orientation even if that orientation was for other
apps.

This CL addresses this issue by waiting until the window is activated.

BUG= 708202 
TEST=covered by unit test, plus manual tests using sample app.

Review-Url: https://codereview.chromium.org/2792973002
Cr-Commit-Position: refs/heads/master@{#462206}
Committed:
https://chromium.googlesource.com/chromium/src/+/4f5b7f72da4ca1534233252c673f9c162bdb25f9

Review-Url: https://codereview.chromium.org/2802403002 .
Cr-Commit-Position: refs/branch-heads/3029@{#638}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}

[modify] https://crrev.com/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b/ash/content/screen_orientation_delegate_chromeos.cc
[modify] https://crrev.com/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b/ash/display/display_manager_unittest.cc
[modify] https://crrev.com/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b/ash/display/screen_orientation_controller_chromeos.cc
[modify] https://crrev.com/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b/ash/display/screen_orientation_controller_chromeos.h
[modify] https://crrev.com/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b/ash/test/screen_orientation_controller_test_api.cc
[modify] https://crrev.com/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b/ash/test/screen_orientation_controller_test_api.h
[modify] https://crrev.com/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b/chrome/browser/ui/ash/launcher/arc_app_window_launcher_controller.cc
[modify] https://crrev.com/7112189d9a2fdcb0e0cfe7ff618d30aebadbb59b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl_unittest.cc

oshima@ Trying to verify this bug. Could you provide verification steps?

It's for ARC bug and must have been verified on ARC side.

I should've put the arc bug, but I couldn't find arc side bug, sorry.