Correct conversion from flowthread to visual coordinate space when there's border/padding.

Correct conversion from flowthread to visual coordinate space when there's border/padding.

If an inner multicol container has border or padding, just using the outer
block offset stored in the inner flow thread won't be good enough. We need to
find the actual first fragmentainer group in the first column set.

Or, put simply: let's do what the comment in the code actually says!

Committed: https://crrev.com/66a452d99ee2a39e60d25a5e119ebb234546b0aa
Cr-Commit-Position: refs/heads/master@{#384737}

[mstensho (USE GERRIT), 2016-04-01 21:36:20]

@leviw, aka the man who can nest 5 multicols inside each other: Here's a
friendly CL, whose test only involves one multicol inside another one. But
there's padding, though. :)

[mstensho (USE GERRIT), 2016-04-01 21:36:49]

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

[mstensho (USE GERRIT), 2016-04-01 21:36:50]

@leviw, aka the man who can nest 5 multicols inside each other: Here's a
friendly CL, whose test only involves one multicol inside another one. But
there's padding, though. :)

[leviw_travelin_and_unemployed, 2016-04-01 22:26:59]

The CQ bit was checked by leviw@chromium.org

[leviw_travelin_and_unemployed, 2016-04-01 22:27:00]

lgtm

This patch is so easy to follow I'm crying!

[commit-bot: I haz the power, 2016-04-01 22:27:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1847343003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1847343003/1

[commit-bot: I haz the power, 2016-04-02 00:00:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-02 00:01:07]

Description was changed from

==========
Correct conversion from flowthread to visual coordinate space when there's
border/padding.

If an inner multicol container has border or padding, just using the outer
block offset stored in the inner flow thread won't be good enough. We need to
find the actual first fragmentainer group in the first column set.

Or, put simply: let's do what the comment in the code actually says!
==========

to

==========
Correct conversion from flowthread to visual coordinate space when there's
border/padding.

If an inner multicol container has border or padding, just using the outer
block offset stored in the inner flow thread won't be good enough. We need to
find the actual first fragmentainer group in the first column set.

Or, put simply: let's do what the comment in the code actually says!

Committed: https://crrev.com/66a452d99ee2a39e60d25a5e119ebb234546b0aa
Cr-Commit-Position: refs/heads/master@{#384737}
==========

[commit-bot: I haz the power, 2016-04-02 00:01:09]

Patchset 1 (id:??) landed as
https://crrev.com/66a452d99ee2a39e60d25a5e119ebb234546b0aa
Cr-Commit-Position: refs/heads/master@{#384737}