[css-tables] Don't use internal layout structure when iterating all rows

[css-tables] Don't use internal layout structure when iterating all rows

Instead use basic firstChild and nextSibling. This avoids a crash when
the internal layout structure is dirty.

Add DCHECK to discourage future mistakes.

BUG=627839
Committed: https://crrev.com/6861fa525cd261302ed9a6f0e4ec420c682d2a8c
Cr-Commit-Position: refs/heads/master@{#405555}

[dgrogan, 2016-07-14 03:06:39]

dgrogan@chromium.org changed reviewers:
+ eae@chromium.org

[dgrogan, 2016-07-14 03:06:40]

Emil, could you review this?

[eae, 2016-07-14 16:34:19]

OK, LGTM

[eae, 2016-07-14 16:34:23]

The CQ bit was checked by eae@chromium.org

[commit-bot: I haz the power, 2016-07-14 16:34:43]

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, 2016-07-14 18:19:07]

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

[commit-bot: I haz the power, 2016-07-14 18:19:09]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[dgrogan, 2016-07-14 19:47:24]

The CQ bit was checked by dgrogan@chromium.org

[commit-bot: I haz the power, 2016-07-14 19:48:01]

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, 2016-07-14 20:36:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-14 20:39:00]

Description was changed from

==========
[css-tables] Don't use internal layout structure when iterating all rows

Instead use basic firstChild and nextSibling. This avoids a crash when
the internal layout structure is dirty.

Add DCHECK to discourage future mistakes.

BUG=627839
==========

to

==========
[css-tables] Don't use internal layout structure when iterating all rows

Instead use basic firstChild and nextSibling. This avoids a crash when
the internal layout structure is dirty.

Add DCHECK to discourage future mistakes.

BUG=627839

Committed: https://crrev.com/6861fa525cd261302ed9a6f0e4ec420c682d2a8c
Cr-Commit-Position: refs/heads/master@{#405555}
==========

[commit-bot: I haz the power, 2016-07-14 20:39:01]

Patchset 1 (id:??) landed as
https://crrev.com/6861fa525cd261302ed9a6f0e4ec420c682d2a8c
Cr-Commit-Position: refs/heads/master@{#405555}