Add UMA stats for chromeos dircrypto migration.

Add UMA stats for chromeos dircrypto migration.

There are a number of statistics we would like to track when
migrating chromeos users' home directories from ecryptfs to ext4-crypto
based encryption.

BUG=688901
TEST=./validate_format.py && ./pretty_print.py
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2780103002
Cr-Commit-Position: refs/heads/master@{#466266}
(cherry picked from commit bfce95b70e45ee513b3735e27660fbecc1eeea5f)

Review-Url: https://codereview.chromium.org/2835883002
Cr-Commit-Position: refs/branch-heads/3071@{#152}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/1a502b46093265ccb60c5deaf3c5707138e26be8

[dspaid, 2017-04-24 00:51:38]

dspaid@chromium.org changed reviewers:
+ kinaba@chromium.org

[dspaid, 2017-04-24 00:51:38]

This is a cherrypick of the CL you approved earlier (don't have
chromium-committer, so I can't land via drover).

[kinaba, 2017-04-24 00:54:30]

lgtm

[dspaid, 2017-04-24 00:56:01]

The CQ bit was checked by dspaid@chromium.org

[commit-bot: I haz the power, 2017-04-24 00:56:16]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-24 00:56:16]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-04-24 00:56:19]

CLs for remote refs other than refs/heads/master must contain NOTRY=true and
NOPRESUBMIT=true in order for the CQ to process them

[dspaid, 2017-04-24 01:10:18]

Description was changed from

==========
Add UMA stats for chromeos dircrypto migration.

There are a number of statistics we would like to track when
migrating chromeos users' home directories from ecryptfs to ext4-crypto
based encryption.

BUG=688901
TEST=./validate_format.py && ./pretty_print.py

Review-Url: https://codereview.chromium.org/2780103002
Cr-Commit-Position: refs/heads/master@{#466266}
(cherry picked from commit bfce95b70e45ee513b3735e27660fbecc1eeea5f)
==========

to

==========
Add UMA stats for chromeos dircrypto migration.

There are a number of statistics we would like to track when
migrating chromeos users' home directories from ecryptfs to ext4-crypto
based encryption.

BUG=688901
TEST=./validate_format.py && ./pretty_print.py
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2780103002
Cr-Commit-Position: refs/heads/master@{#466266}
(cherry picked from commit bfce95b70e45ee513b3735e27660fbecc1eeea5f)
==========

[dspaid, 2017-04-24 01:10:28]

The CQ bit was checked by dspaid@chromium.org

[commit-bot: I haz the power, 2017-04-24 01:10:40]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-24 01:11:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1492996228090600, "parent_rev":
"31455b249cf2737bf96ab751252b84e8c85b3804", "commit_rev":
"1a502b46093265ccb60c5deaf3c5707138e26be8"}

[commit-bot: I haz the power, 2017-04-24 01:12:08]

Description was changed from

==========
Add UMA stats for chromeos dircrypto migration.

There are a number of statistics we would like to track when
migrating chromeos users' home directories from ecryptfs to ext4-crypto
based encryption.

BUG=688901
TEST=./validate_format.py && ./pretty_print.py
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2780103002
Cr-Commit-Position: refs/heads/master@{#466266}
(cherry picked from commit bfce95b70e45ee513b3735e27660fbecc1eeea5f)
==========

to

==========
Add UMA stats for chromeos dircrypto migration.

There are a number of statistics we would like to track when
migrating chromeos users' home directories from ecryptfs to ext4-crypto
based encryption.

BUG=688901
TEST=./validate_format.py && ./pretty_print.py
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2780103002
Cr-Commit-Position: refs/heads/master@{#466266}
(cherry picked from commit bfce95b70e45ee513b3735e27660fbecc1eeea5f)

Review-Url: https://codereview.chromium.org/2835883002
Cr-Commit-Position: refs/branch-heads/3071@{#152}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/1a502b46093265ccb60c5deaf3c5...
==========

[commit-bot: I haz the power, 2017-04-24 01:12:09]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/1a502b46093265ccb60c5deaf3c5...