[Merge M60] arc: Provide metric to monitor Play Store window is shown time.

[Merge M60] arc: Provide metric to monitor Play Store window is shown time.

This adds UMA to track time between initial ARC OptIn and moment
when the first Play Store window is shown.

BUG=728880
TEST=Manually for managed/unmanaged accounts. Confirmed that
     metric is updted only for initial ARC boot.
TBR=yusukes@chromium.org,oshima@chromium.org,isherman@chromium.org
NOTRY=true
NOPRESUBMIT=true

Change-Id: I2b988f039ec709a4d9c369a27ccd01777b688028
Reviewed-on: https://chromium-review.googlesource.com/522442
Commit-Queue: Yury Khmel <khmel@google.com>;
Reviewed-by: Yusuke Sato <yusukes@chromium.org>;
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>;
Reviewed-by: Ilya Sherman <isherman@chromium.org>;
Cr-Original-Commit-Position: refs/heads/master@{#476874}
Review-Url: https://codereview.chromium.org/2922383002
Cr-Commit-Position: refs/branch-heads/3112@{#199}
Cr-Branched-From: b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed: https://chromium.googlesource.com/chromium/src/+/5e6cd66d550e0942591b62710c8b429d65d65dbc

[khmel, 2017-06-06 15:23:22]

Description was changed from

==========
[Merge M60] arc: Provide metric to monitor Play Store window is shown time.

This adds UMA to track time between initial ARC OptIn and moment
when the first Play Store window is shown.

BUG=728880
TEST=Manually for managed/unmanaged accounts. Confirmed that
     metric is updted only for initial ARC boot.
TBR=yusukes@chromium.org,oshima@chromium.org,isherman@chromium.org
NOTRY=true
NOPRESUBMIT=true

Change-Id: I2b988f039ec709a4d9c369a27ccd01777b688028
Reviewed-on: https://chromium-review.googlesource.com/522442
Commit-Queue: Yury Khmel <khmel@google.com>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476874}
(cherry picked from commit 3f9e6d5f978cfe76acff68fb181730b26a4612b1)
==========

to

==========
[Merge M60] arc: Provide metric to monitor Play Store window is shown time.

This adds UMA to track time between initial ARC OptIn and moment
when the first Play Store window is shown.

BUG=728880
TEST=Manually for managed/unmanaged accounts. Confirmed that
     metric is updted only for initial ARC boot.
TBR=yusukes@chromium.org,oshima@chromium.org,isherman@chromium.org
NOTRY=true
NOPRESUBMIT=true

Change-Id: I2b988f039ec709a4d9c369a27ccd01777b688028
Reviewed-on: https://chromium-review.googlesource.com/522442
Commit-Queue: Yury Khmel <khmel@google.com>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476874}
(cherry picked from commit 3f9e6d5f978cfe76acff68fb181730b26a4612b1)
==========

[khmel, 2017-06-06 15:23:22]

khmel@chromium.org changed reviewers:
- isherman@chromium.org, oshima@chromium.org, yusukes@chromium.org

[khmel, 2017-06-06 19:35:26]

The CQ bit was checked by khmel@chromium.org

[commit-bot: I haz the power, 2017-06-06 19:35:55]

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, 2017-06-06 19:36:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1496777726699200, "parent_rev":
"a7bf9ee09dc8641a1385ac2c48edfbd6400555f8", "commit_rev":
"5e6cd66d550e0942591b62710c8b429d65d65dbc"}

[commit-bot: I haz the power, 2017-06-06 19:36:29]

Description was changed from

==========
[Merge M60] arc: Provide metric to monitor Play Store window is shown time.

This adds UMA to track time between initial ARC OptIn and moment
when the first Play Store window is shown.

BUG=728880
TEST=Manually for managed/unmanaged accounts. Confirmed that
     metric is updted only for initial ARC boot.
TBR=yusukes@chromium.org,oshima@chromium.org,isherman@chromium.org
NOTRY=true
NOPRESUBMIT=true

Change-Id: I2b988f039ec709a4d9c369a27ccd01777b688028
Reviewed-on: https://chromium-review.googlesource.com/522442
Commit-Queue: Yury Khmel <khmel@google.com>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476874}
(cherry picked from commit 3f9e6d5f978cfe76acff68fb181730b26a4612b1)
==========

to

==========
[Merge M60] arc: Provide metric to monitor Play Store window is shown time.

This adds UMA to track time between initial ARC OptIn and moment
when the first Play Store window is shown.

BUG=728880
TEST=Manually for managed/unmanaged accounts. Confirmed that
     metric is updted only for initial ARC boot.
TBR=yusukes@chromium.org,oshima@chromium.org,isherman@chromium.org
NOTRY=true
NOPRESUBMIT=true

Change-Id: I2b988f039ec709a4d9c369a27ccd01777b688028
Reviewed-on: https://chromium-review.googlesource.com/522442
Commit-Queue: Yury Khmel <khmel@google.com>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#476874}
Review-Url: https://codereview.chromium.org/2922383002
Cr-Commit-Position: refs/branch-heads/3112@{#199}
Cr-Branched-From:
b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed:
https://chromium.googlesource.com/chromium/src/+/5e6cd66d550e0942591b62710c8b...
==========

[commit-bot: I haz the power, 2017-06-06 19:36:31]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/5e6cd66d550e0942591b62710c8b...