The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3ab0d85b5bea7fca2637d10e7ccc1fa8cb0e3a94

commit 3ab0d85b5bea7fca2637d10e7ccc1fa8cb0e3a94
Author: dspaid <dspaid@chromium.org>
Date: Fri Jun 24 06:08:52 2016

Add strings and notifier ID for low disk.

Actual notifications using these strings will be added in a followup CL.

BUG= 622590 

Review-Url: https://codereview.chromium.org/2090913002
Cr-Commit-Position: refs/heads/master@{#401825}

[modify] https://crrev.com/3ab0d85b5bea7fca2637d10e7ccc1fa8cb0e3a94/ash/common/system/system_notifier.cc
[modify] https://crrev.com/3ab0d85b5bea7fca2637d10e7ccc1fa8cb0e3a94/ash/common/system/system_notifier.h
[modify] https://crrev.com/3ab0d85b5bea7fca2637d10e7ccc1fa8cb0e3a94/chrome/app/chromeos_strings.grdp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e12692bad71ee7926296f703be5ab204e21d235f

commit e12692bad71ee7926296f703be5ab204e21d235f
Author: dspaid <dspaid@chromium.org>
Date: Thu Jun 30 02:15:30 2016

Roll src/third_party/cros_system_api/ 11d79edee..2cf87623e (2 commits).

https://chromium.googlesource.com/chromiumos/platform/system_api.git/+log/11d79edeefbd..2cf87623ebe6

$ git log 11d79edee..2cf87623e --date=short --no-merges --format='%ad %ae %s'
2016-06-29 fukino cryptohome: Add constants and protobuf for GetAccountDiskUsage.
2016-06-28 dspaid Add name of new signal handler to dbus constants.

BUG= 622590 

Review-Url: https://codereview.chromium.org/2107363002
Cr-Commit-Position: refs/heads/master@{#403064}

[modify] https://crrev.com/e12692bad71ee7926296f703be5ab204e21d235f/DEPS

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/43c9801f43e8feb9bd5a58436ead31deae5382c4

commit 43c9801f43e8feb9bd5a58436ead31deae5382c4
Author: dspaid <dspaid@chromium.org>
Date: Thu Jun 30 04:48:39 2016

Add signal handler for low disk notification

Cryptohome polls every minute for remaining disk space and emits a DBus
signal if the remaining space is lower than a given threshold.  This
patch adds a handler that will call the specified callback when this
signal is received.

BUG= 622590 
TEST=unit tests in following CL to implement notifications

Review-Url: https://codereview.chromium.org/2101853002
Cr-Commit-Position: refs/heads/master@{#403089}

[modify] https://crrev.com/43c9801f43e8feb9bd5a58436ead31deae5382c4/chromeos/dbus/cryptohome_client.cc
[modify] https://crrev.com/43c9801f43e8feb9bd5a58436ead31deae5382c4/chromeos/dbus/cryptohome_client.h
[modify] https://crrev.com/43c9801f43e8feb9bd5a58436ead31deae5382c4/chromeos/dbus/fake_cryptohome_client.cc
[modify] https://crrev.com/43c9801f43e8feb9bd5a58436ead31deae5382c4/chromeos/dbus/fake_cryptohome_client.h
[modify] https://crrev.com/43c9801f43e8feb9bd5a58436ead31deae5382c4/chromeos/dbus/mock_cryptohome_client.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0d43514effc1b793aef2794815bc6f5b5e2811db

commit 0d43514effc1b793aef2794815bc6f5b5e2811db
Author: dspaid <dspaid@chromium.org>
Date: Thu Jun 30 23:39:17 2016

Show notifications on low disk space.

The notifications are shown at most once per hour, or whenever the severity of the notification changes.

BUG= 622590 
TEST=./out/Release/unit_tests --gtest_filter=LowDiskNotificationTest.*

Review-Url: https://codereview.chromium.org/2082363004
Cr-Commit-Position: refs/heads/master@{#403342}

[modify] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
[modify] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/chrome/browser/chromeos/chrome_browser_main_chromeos.h
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/chrome/browser/chromeos/ui/low_disk_notification.cc
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/chrome/browser/chromeos/ui/low_disk_notification.h
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/chrome/browser/chromeos/ui/low_disk_notification_unittest.cc
[modify] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/chrome/chrome_browser_chromeos.gypi
[modify] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/chrome/chrome_tests_unit.gypi
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/ui/chromeos/resources/default_100_percent/filesystem/button_storage_manager.png
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/ui/chromeos/resources/default_100_percent/filesystem/notification_disk_space_critical.png
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/ui/chromeos/resources/default_100_percent/filesystem/notification_disk_space_low.png
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/ui/chromeos/resources/default_200_percent/filesystem/button_storage_manager.png
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/ui/chromeos/resources/default_200_percent/filesystem/notification_disk_space_critical.png
[add] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/ui/chromeos/resources/default_200_percent/filesystem/notification_disk_space_low.png
[modify] https://crrev.com/0d43514effc1b793aef2794815bc6f5b5e2811db/ui/chromeos/resources/ui_chromeos_resources.grd

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/df142fd2cb934119b9dadc9971cd6b52dd85f249

commit df142fd2cb934119b9dadc9971cd6b52dd85f249
Author: dspaid <dspaid@chromium.org>
Date: Fri Jul 01 07:15:15 2016

Properly initialize last_notification_severity_.

BUG= 622590 
TEST=./out/Debug/unit_tests --gtest_filter=LowDiskNotificationTest.*

Review-Url: https://codereview.chromium.org/2115793002
Cr-Commit-Position: refs/heads/master@{#403420}

[modify] https://crrev.com/df142fd2cb934119b9dadc9971cd6b52dd85f249/chrome/browser/chromeos/ui/low_disk_notification.h