The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/48358e269fbafbae5df07b4a82f0a7762f1ce19b

commit 48358e269fbafbae5df07b4a82f0a7762f1ce19b
Author: oshima <oshima@chromium.org>
Date: Wed May 10 05:37:11 2017

Don't show rotation change notification in tablet mode unless it's changed by user.

BUG= 720190 
TEST=covered by unit test

Review-Url: https://codereview.chromium.org/2866423002
Cr-Commit-Position: refs/heads/master@{#470482}

[modify] https://crrev.com/48358e269fbafbae5df07b4a82f0a7762f1ce19b/ash/system/screen_layout_observer.cc
[modify] https://crrev.com/48358e269fbafbae5df07b4a82f0a7762f1ce19b/ash/system/screen_layout_observer_unittest.cc

+kuscher@ let me know if you want to merge this to 58.

At this point I would defer to 59 unless there is a strong product request to bring this in to 58. 

Your change meets the bar and is auto-approved for M59. Please go ahead and merge the CL to branch 3071 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), gkihumba@(ChromeOS), Abdul Syed@(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/+/7bcca463327ac6a7271475e93887b1da46270baa

commit 7bcca463327ac6a7271475e93887b1da46270baa
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Thu May 11 11:58:55 2017

Don't show rotation change notification in tablet mode unless it's changed by user.

BUG= 720190 
TEST=covered by unit test

Review-Url: https://codereview.chromium.org/2866423002
Cr-Commit-Position: refs/heads/master@{#470482}
(cherry picked from commit 48358e269fbafbae5df07b4a82f0a7762f1ce19b)

Review-Url: https://codereview.chromium.org/2875923002 .
Cr-Commit-Position: refs/branch-heads/3071@{#511}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}

[modify] https://crrev.com/7bcca463327ac6a7271475e93887b1da46270baa/ash/system/screen_layout_observer.cc
[modify] https://crrev.com/7bcca463327ac6a7271475e93887b1da46270baa/ash/system/screen_layout_observer_unittest.cc