The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e88b030f517ff578aff9af1a5a7762fc313163ad

commit e88b030f517ff578aff9af1a5a7762fc313163ad
Author: fukino <fukino@chromium.org>
Date: Tue Apr 25 05:18:39 2017

cros: Prevent casual shut down and power save during migration.

In the migration UI, we ask users that "Don't turn off or close your Chromebook".
In addition, we can resume migration even when user shut down / suspend the device
during migration.

That said, it should be even safer to prevent casual shutdown and power save mode by:
- Hide "Shut down" button during migration.
- Block power save during migration.

Note that if the user close the lid, the system will be suspended.
We have heard about heat issues when the lid is closed, and the system will be
heated by heavy CPU usage of migration.
It should be safer not to keep the device awake when the lid is closed.

BUG= 711454 
TEST=manually tested that the "Shut down" button was hidden and the device did
not go to sleep mode during migration.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2842433002
Cr-Commit-Position: refs/heads/master@{#466879}

[modify] https://crrev.com/e88b030f517ff578aff9af1a5a7762fc313163ad/chrome/browser/resources/chromeos/login/header_bar.css
[modify] https://crrev.com/e88b030f517ff578aff9af1a5a7762fc313163ad/chrome/browser/resources/chromeos/login/screen_encryption_migration.js
[modify] https://crrev.com/e88b030f517ff578aff9af1a5a7762fc313163ad/chrome/browser/ui/BUILD.gn
[modify] https://crrev.com/e88b030f517ff578aff9af1a5a7762fc313163ad/chrome/browser/ui/webui/chromeos/login/encryption_migration_screen_handler.cc
[modify] https://crrev.com/e88b030f517ff578aff9af1a5a7762fc313163ad/chrome/browser/ui/webui/chromeos/login/encryption_migration_screen_handler.h

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/+/55a06d1004b127df1fde63455dcb6cdd458714e2

commit 55a06d1004b127df1fde63455dcb6cdd458714e2
Author: Naoki Fukino <fukino@chromium.org>
Date: Wed Apr 26 10:46:10 2017

cros: Prevent casual shut down and power save during migration.

In the migration UI, we ask users that "Don't turn off or close your Chromebook".
In addition, we can resume migration even when user shut down / suspend the device
during migration.

That said, it should be even safer to prevent casual shutdown and power save mode by:
- Hide "Shut down" button during migration.
- Block power save during migration.

Note that if the user close the lid, the system will be suspended.
We have heard about heat issues when the lid is closed, and the system will be
heated by heavy CPU usage of migration.
It should be safer not to keep the device awake when the lid is closed.

BUG= 711454 
TEST=manually tested that the "Shut down" button was hidden and the device did
not go to sleep mode during migration.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
TBR=xiyuan@chromium.org

Review-Url: https://codereview.chromium.org/2842433002
Cr-Commit-Position: refs/heads/master@{#466879}
(cherry picked from commit e88b030f517ff578aff9af1a5a7762fc313163ad)

Review-Url: https://codereview.chromium.org/2842143002 .
Cr-Commit-Position: refs/branch-heads/3071@{#222}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}

[modify] https://crrev.com/55a06d1004b127df1fde63455dcb6cdd458714e2/chrome/browser/resources/chromeos/login/header_bar.css
[modify] https://crrev.com/55a06d1004b127df1fde63455dcb6cdd458714e2/chrome/browser/resources/chromeos/login/screen_encryption_migration.js
[modify] https://crrev.com/55a06d1004b127df1fde63455dcb6cdd458714e2/chrome/browser/ui/BUILD.gn
[modify] https://crrev.com/55a06d1004b127df1fde63455dcb6cdd458714e2/chrome/browser/ui/webui/chromeos/login/encryption_migration_screen_handler.cc
[modify] https://crrev.com/55a06d1004b127df1fde63455dcb6cdd458714e2/chrome/browser/ui/webui/chromeos/login/encryption_migration_screen_handler.h

Verified on ChromeOS 9532.0.0, 60.0.3092.0