Isolate strictly unbreakable multicol containers that are nested.

Isolate strictly unbreakable multicol containers that are nested.

A strictly unbreakable object (i.e. when getPaginationBreakability() ==
ForbidBreaks) has no valid break points inside. This is the case for e.g.
images, writing mode roots and scrollable objects. If such an object is an
inner multicol container, column content inside shouldn't interact with
enclosing columns.

BUG=696726, 695535, 675070
Review-Url: https://codereview.chromium.org/2729903003
Cr-Commit-Position: refs/heads/master@{#454765}
Committed: https://chromium.googlesource.com/chromium/src/+/52c98e8a1b2a5100406e2bdd5d4dc2f444e061c5

[mstensho (USE GERRIT), 2017-03-03 14:50:59]

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

[commit-bot: I haz the power, 2017-03-03 14:51:05]

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, 2017-03-03 16:37:36]

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

[commit-bot: I haz the power, 2017-03-03 16:37:37]

Dry run: This issue passed the CQ dry run.

[mstensho (USE GERRIT), 2017-03-03 19:54:12]

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

[eae, 2017-03-04 05:19:55]

LGTM

[mstensho (USE GERRIT), 2017-03-04 06:07:03]

The CQ bit was checked by mstensho@opera.com

[commit-bot: I haz the power, 2017-03-04 06:07:17]

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, 2017-03-04 06:10:45]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1488607623860610, "parent_rev":
"a53c8f8f7a4c7f0f73eaa321909aefee7639bb35", "commit_rev":
"52c98e8a1b2a5100406e2bdd5d4dc2f444e061c5"}

[commit-bot: I haz the power, 2017-03-04 06:12:03]

Description was changed from

==========
Isolate strictly unbreakable multicol containers that are nested.

A strictly unbreakable object (i.e. when getPaginationBreakability() ==
ForbidBreaks) has no valid break points inside. This is the case for e.g.
images, writing mode roots and scrollable objects. If such an object is an
inner multicol container, column content inside shouldn't interact with
enclosing columns.

BUG=696726,695535,675070
==========

to

==========
Isolate strictly unbreakable multicol containers that are nested.

A strictly unbreakable object (i.e. when getPaginationBreakability() ==
ForbidBreaks) has no valid break points inside. This is the case for e.g.
images, writing mode roots and scrollable objects. If such an object is an
inner multicol container, column content inside shouldn't interact with
enclosing columns.

BUG=696726,695535,675070

Review-Url: https://codereview.chromium.org/2729903003
Cr-Commit-Position: refs/heads/master@{#454765}
Committed:
https://chromium.googlesource.com/chromium/src/+/52c98e8a1b2a5100406e2bdd5d4d...
==========

[commit-bot: I haz the power, 2017-03-04 06:12:04]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/52c98e8a1b2a5100406e2bdd5d4d...