[css-grid] Refactor information stored related to column positions

[css-grid] Refactor information stored related to column positions

In m_columnPositions we were storing position of each column
including the alignment offset, always from the logical left,
and the border and padding, depending on the direction.

This was really confusing as in the case of RTL direction
we were adding the offset from the left and
the right border and padding.

This patches changes it to store always the info from the left,
so even in RTL direction we use the left border and padding.

This allows us to simplify translateRTLCoordinate() as
it doesn't need to care about border and padding anymore.

No new tests, no change of behavior.

Committed: https://crrev.com/d1c930ed4f146adaa9cf9489afc10719f2f0bfa0
Cr-Commit-Position: refs/heads/master@{#389731}

[Manuel Rego, 2016-04-25 11:45:31]

rego@igalia.com changed reviewers:
+ cbiesinger@chromium.org, jfernandez@igalia.com, svillar@igalia.com

[eae, 2016-04-26 01:51:17]

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

[eae, 2016-04-26 01:51:17]

LGTM

[Manuel Rego, 2016-04-26 07:03:37]

The CQ bit was checked by rego@igalia.com

[commit-bot: I haz the power, 2016-04-26 07:03:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1915903002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1915903002/1

[commit-bot: I haz the power, 2016-04-26 09:44:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-26 09:46:23]

Description was changed from

==========
[css-grid] Refactor information stored related to column positions

In m_columnPositions we were storing position of each column
including the alignment offset, always from the logical left,
and the border and padding, depending on the direction.

This was really confusing as in the case of RTL direction
we were adding the offset from the left and
the right border and padding.

This patches changes it to store always the info from the left,
so even in RTL direction we use the left border and padding.

This allows us to simplify translateRTLCoordinate() as
it doesn't need to care about border and padding anymore.

No new tests, no change of behavior.
==========

to

==========
[css-grid] Refactor information stored related to column positions

In m_columnPositions we were storing position of each column
including the alignment offset, always from the logical left,
and the border and padding, depending on the direction.

This was really confusing as in the case of RTL direction
we were adding the offset from the left and
the right border and padding.

This patches changes it to store always the info from the left,
so even in RTL direction we use the left border and padding.

This allows us to simplify translateRTLCoordinate() as
it doesn't need to care about border and padding anymore.

No new tests, no change of behavior.

Committed: https://crrev.com/d1c930ed4f146adaa9cf9489afc10719f2f0bfa0
Cr-Commit-Position: refs/heads/master@{#389731}
==========

[commit-bot: I haz the power, 2016-04-26 09:46:24]

Patchset 1 (id:??) landed as
https://crrev.com/d1c930ed4f146adaa9cf9489afc10719f2f0bfa0
Cr-Commit-Position: refs/heads/master@{#389731}