Supporting study definitions without default groups and end_date filtering.

Supporting study definitions without default groups and end_date filtering.

Reland of https://codereview.chromium.org/2614443002, which was reverted due to static initializer.

end_date is a replacement for expiry_date, which is deprecated by this change. The difference is that end_date is acts as a normal filter, and causes study to not be created when the date is past. expiry_date caused the study to be created, and forced to the default group.

This change introduces a generic default group name, which is used for the field trial API when a study doesn't specify one.

BUG=677976
Review-Url: https://codereview.chromium.org/2612243003
Cr-Commit-Position: refs/heads/master@{#441976}
Committed: https://chromium.googlesource.com/chromium/src/+/5ff54103eeded8b0a3741320e39bb1cc029ba1ca

[jwd, 2017-01-05 22:04:37]

Description was changed from

==========
Supporting study definitions without default groups and end_date filtering.

end_date is a replacement for expiry_date, which is deprecated by this change.
The difference is that end_date is acts as a normal filter, and causes study to
not be created when the date is past. expiry_date caused the study to be
created, and forced to the default group.

This change introduces a generic default group name, which is used for the field
trial API when a study doesn't specify one.

BUG=677976
==========

to

==========
Supporting study definitions without default groups and end_date filtering.

Reland of https://codereview.chromium.org/2614443002, which was reverted due to
static initializer.

end_date is a replacement for expiry_date, which is deprecated by this change.
The difference is that end_date is acts as a normal filter, and causes study to
not be created when the date is past. expiry_date caused the study to be
created, and forced to the default group.

This change introduces a generic default group name, which is used for the field
trial API when a study doesn't specify one.

BUG=677976
==========

[jwd, 2017-01-05 22:04:50]

jwd@chromium.org changed reviewers:
+ rkaplow@chromium.org

[rkaplow, 2017-01-06 15:39:24]

lgtm

[jwd, 2017-01-06 16:10:33]

The CQ bit was checked by jwd@chromium.org

[commit-bot: I haz the power, 2017-01-06 16:10:53]

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, 2017-01-06 18:09:40]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1483719033470080,
"parent_rev": "2f9c8630f029d251af62445f88357d0edbf0543c", "commit_rev":
"5ff54103eeded8b0a3741320e39bb1cc029ba1ca"}

[commit-bot: I haz the power, 2017-01-06 18:10:13]

Description was changed from

==========
Supporting study definitions without default groups and end_date filtering.

Reland of https://codereview.chromium.org/2614443002, which was reverted due to
static initializer.

end_date is a replacement for expiry_date, which is deprecated by this change.
The difference is that end_date is acts as a normal filter, and causes study to
not be created when the date is past. expiry_date caused the study to be
created, and forced to the default group.

This change introduces a generic default group name, which is used for the field
trial API when a study doesn't specify one.

BUG=677976
==========

to

==========
Supporting study definitions without default groups and end_date filtering.

Reland of https://codereview.chromium.org/2614443002, which was reverted due to
static initializer.

end_date is a replacement for expiry_date, which is deprecated by this change.
The difference is that end_date is acts as a normal filter, and causes study to
not be created when the date is past. expiry_date caused the study to be
created, and forced to the default group.

This change introduces a generic default group name, which is used for the field
trial API when a study doesn't specify one.

BUG=677976

Review-Url: https://codereview.chromium.org/2612243003
Cr-Commit-Position: refs/heads/master@{#441976}
Committed:
https://chromium.googlesource.com/chromium/src/+/5ff54103eeded8b0a3741320e39b...
==========

[commit-bot: I haz the power, 2017-01-06 18:10:14]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/5ff54103eeded8b0a3741320e39b...