cros: Remove user directory when encryption migration fails.

cros: Remove user directory when encryption migration fails.

When the migration UI is notified by cryptohome that cryptohome gets unexpected
errors during migration and it gives up migration, we should remove the
user's cryptohome to make sure that the user will be able to log in to
the Desktop next time.

After the user's cryptohome is removed, we get password verification errors
on the existing user pod three times.
It seems an independent issue, so I filed crbug.com/715474 and will look into separately.

BUG=713556
TEST=manually tested by forcing cryptohome fail during migration and confirming the cryptohome is gone.
TBR=xiyuan@chromium.org

Review-Url: https://codereview.chromium.org/2838303003
Cr-Commit-Position: refs/heads/master@{#467608}
(cherry picked from commit 1339ec6addf0faa53da2c7418a0de5b6803d89cf)

Review-Url: https://codereview.chromium.org/2851683002 .
Cr-Commit-Position: refs/branch-heads/3071@{#285}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/fb47d19268582cdc5a16222901fc937472eb91be

[fukino, 2017-04-28 06:01:32]

Description was changed from

==========
cros: Remove user directory when encryption migration fails.

When the migration UI is notified by cryptohome that cryptohome gets unexpected
errors during migration and it gives up migration, we should remove the
user's cryptohome to make sure that the user will be able to log in to
the Desktop next time.

After the user's cryptohome is removed, we get password verification errors
on the existing user pod three times.
It seems an independent issue, so I filed crbug.com/715474 and will look into
separately.

BUG=713556
TEST=manually tested by forcing cryptohome fail during migration and confirming
the cryptohome is gone.
TBR=xiyuan@chromium.org

Review-Url: https://codereview.chromium.org/2838303003
Cr-Commit-Position: refs/heads/master@{#467608}
(cherry picked from commit 1339ec6addf0faa53da2c7418a0de5b6803d89cf)
==========

to

==========
cros: Remove user directory when encryption migration fails.

When the migration UI is notified by cryptohome that cryptohome gets unexpected
errors during migration and it gives up migration, we should remove the
user's cryptohome to make sure that the user will be able to log in to
the Desktop next time.

After the user's cryptohome is removed, we get password verification errors
on the existing user pod three times.
It seems an independent issue, so I filed crbug.com/715474 and will look into
separately.

BUG=713556
TEST=manually tested by forcing cryptohome fail during migration and confirming
the cryptohome is gone.
TBR=xiyuan@chromium.org

Review-Url: https://codereview.chromium.org/2838303003
Cr-Commit-Position: refs/heads/master@{#467608}
(cherry picked from commit 1339ec6addf0faa53da2c7418a0de5b6803d89cf)

Review-Url: https://codereview.chromium.org/2851683002 .
Cr-Commit-Position: refs/branch-heads/3071@{#285}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/fb47d19268582cdc5a16222901fc...
==========

[fukino, 2017-04-28 06:01:35]

Committed patchset #1 (id:1) manually as
fb47d19268582cdc5a16222901fc937472eb91be.