treapstore: Add Collection.VisitItemsAscend.

treapstore: Add Collection.VisitItemsAscend.

This offers an optimal, but unfortunately callback-based, traversal of
the collection.

BUG=chromium:675485
TEST=unit

Review-Url: https://codereview.chromium.org/2616303002
Committed: https://github.com/luci/luci-go/commit/647d8243b192c5a603b4befc3cf524f716003b95

[dnj, 2017-01-08 03:38:36]

dnj@chromium.org changed reviewers:
+ iannucci@chromium.org, vadimsh@chromium.org

[dnj, 2017-01-08 03:38:37]

PTAL

[iannucci, 2017-01-08 05:12:03]

lgtm

[dnj, 2017-01-08 19:10:26]

The CQ bit was checked by dnj@chromium.org

[commit-bot: I haz the power, 2017-01-08 19:10:30]

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, 2017-01-08 19:15:47]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1483902626718350, "parent_rev":
"a675724fae898cba8386a64186ad75b71730c393", "commit_rev":
"647d8243b192c5a603b4befc3cf524f716003b95"}

[commit-bot: I haz the power, 2017-01-08 19:15:53]

Description was changed from

==========
treapstore: Add Collection.VisitItemsAscend.

This offers an optimal, but unfortunately callback-based, traversal of
the collection.

BUG=chromium:675485
TEST=unit
==========

to

==========
treapstore: Add Collection.VisitItemsAscend.

This offers an optimal, but unfortunately callback-based, traversal of
the collection.

BUG=chromium:675485
TEST=unit

Review-Url: https://codereview.chromium.org/2616303002
Committed:
https://github.com/luci/luci-go/commit/647d8243b192c5a603b4befc3cf524f716003b95
==========

[commit-bot: I haz the power, 2017-01-08 19:15:54]

Committed patchset #1 (id:1) as
https://github.com/luci/luci-go/commit/647d8243b192c5a603b4befc3cf524f716003b95