Correct flowThreadTranslationAtOffset() for vertical-rl writing mode.

Correct flowThreadTranslationAtOffset() for vertical-rl writing mode.

The problem was that a rectangle was shifted by offsetFromColumnSet() after
having been made physical. However, offsetFromColumnSet() is semi-logical
(flipped block direction coordinate, like e.g. LayoutBox::m_frameRect), so we
need to add it in before flipping the rectangle.

This caused all fragmentainer groups but the first one to be translated
incorrectly.

Committed: https://crrev.com/6fa58d7ef3745c0b84191fd5fdae0e105a5f619e
Cr-Commit-Position: refs/heads/master@{#418870}

[mstensho (USE GERRIT), 2016-09-15 10:30:11]

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

[commit-bot: I haz the power, 2016-09-15 10:30:31]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[mstensho (USE GERRIT), 2016-09-15 12:00:00]

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

[commit-bot: I haz the power, 2016-09-15 12:31:42]

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

[commit-bot: I haz the power, 2016-09-15 12:31:43]

Dry run: This issue passed the CQ dry run.

[eae, 2016-09-15 15:16:31]

LGTM

[eae, 2016-09-15 15:18:41]

The CQ bit was checked by eae@chromium.org

[commit-bot: I haz the power, 2016-09-15 15:18:58]

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, 2016-09-15 15:24:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-15 15:26:48]

Description was changed from

==========
Correct flowThreadTranslationAtOffset() for vertical-rl writing mode.

The problem was that a rectangle was shifted by offsetFromColumnSet() after
having been made physical. However, offsetFromColumnSet() is semi-logical
(flipped block direction coordinate, like e.g. LayoutBox::m_frameRect), so we
need to add it in before flipping the rectangle.

This caused all fragmentainer groups but the first one to be translated
incorrectly.
==========

to

==========
Correct flowThreadTranslationAtOffset() for vertical-rl writing mode.

The problem was that a rectangle was shifted by offsetFromColumnSet() after
having been made physical. However, offsetFromColumnSet() is semi-logical
(flipped block direction coordinate, like e.g. LayoutBox::m_frameRect), so we
need to add it in before flipping the rectangle.

This caused all fragmentainer groups but the first one to be translated
incorrectly.

Committed: https://crrev.com/6fa58d7ef3745c0b84191fd5fdae0e105a5f619e
Cr-Commit-Position: refs/heads/master@{#418870}
==========

[commit-bot: I haz the power, 2016-09-15 15:26:50]

Patchset 1 (id:??) landed as
https://crrev.com/6fa58d7ef3745c0b84191fd5fdae0e105a5f619e
Cr-Commit-Position: refs/heads/master@{#418870}