Allow zero-height fragmentainers.

Allow zero-height fragmentainers.

We used to assert against this, but we really can't, since there are
legitimiate reasons for a fragmentainer (and fragmentainer groups and column
sets) to have zero height, e.g. when its content is zero-height.

BUG=698359
Review-Url: https://codereview.chromium.org/2737503002
Cr-Commit-Position: refs/heads/master@{#455040}
Committed: https://chromium.googlesource.com/chromium/src/+/2fa8cb1b82fe741f526a5009f17b03158349e681

[mstensho (USE GERRIT), 2017-03-06 12:42:06]

The CQ bit was checked by mstensho@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2017-03-06 12:42:16]

Dry run: 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, 2017-03-06 14:19:56]

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

[commit-bot: I haz the power, 2017-03-06 14:19:57]

Dry run: This issue passed the CQ dry run.

[mstensho (USE GERRIT), 2017-03-06 15:00:02]

mstensho@opera.com changed reviewers:
+ eae@chromium.org

[mstensho (USE GERRIT), 2017-03-06 15:00:03]

Some of these assertions have served us well in finding bugs, but I've finally
come to the conclusion that they are invalid.

[eae, 2017-03-07 00:08:52]

LGTM

[eae, 2017-03-07 05:43:57]

The CQ bit was checked by eae@chromium.org

[commit-bot: I haz the power, 2017-03-07 05:44:37]

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, 2017-03-07 05:49:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1488865437046840, "parent_rev":
"04eb2294fb3baa85315da61ef38a3ce225794f0a", "commit_rev":
"2fa8cb1b82fe741f526a5009f17b03158349e681"}

[commit-bot: I haz the power, 2017-03-07 05:50:28]

Description was changed from

==========
Allow zero-height fragmentainers.

We used to assert against this, but we really can't, since there are
legitimiate reasons for a fragmentainer (and fragmentainer groups and column
sets) to have zero height, e.g. when its content is zero-height.

BUG=698359
==========

to

==========
Allow zero-height fragmentainers.

We used to assert against this, but we really can't, since there are
legitimiate reasons for a fragmentainer (and fragmentainer groups and column
sets) to have zero height, e.g. when its content is zero-height.

BUG=698359

Review-Url: https://codereview.chromium.org/2737503002
Cr-Commit-Position: refs/heads/master@{#455040}
Committed:
https://chromium.googlesource.com/chromium/src/+/2fa8cb1b82fe741f526a5009f17b...
==========

[commit-bot: I haz the power, 2017-03-07 05:50:34]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/2fa8cb1b82fe741f526a5009f17b...