[LayoutNG] Add writing mode to NGDerivedConstraintSpace

[LayoutNG] Add writing mode to NGDerivedConstraintSpace

Split NGDerivedConstraintSpace into a separate header and add direction
and writing mode fields. Also change it to use NGLogicalOffset and Size
instead of individual LayoutUnit fields for the offset and size values.

BUG=635619
R=cbiesinger@chromium.org

Committed: https://crrev.com/b76f8a89f3050ce49def73bc11fd08d055faf44c
Cr-Commit-Position: refs/heads/master@{#411389}

[eae, 2016-08-11 15:42:01]

The CQ bit was checked by eae@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-11 15:42:32]

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

[cbiesinger, 2016-08-11 15:57:12]

lgtm

[eae, 2016-08-11 16:00:59]

The CQ bit was checked by eae@chromium.org

[eae, 2016-08-11 16:00:59]

The patchset sent to the CQ was uploaded after l-g-t-m from
cbiesinger@chromium.org
Link to the patchset: https://codereview.chromium.org/2236933003/#ps20001
(title: "[LayoutNG] Add writing mode to NGDerivedConstraintSpace")

[commit-bot: I haz the power, 2016-08-11 16:01:50]

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, 2016-08-11 17:19:36]

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

[commit-bot: I haz the power, 2016-08-11 17:19:37]

Try jobs failed on following builders:
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[eae, 2016-08-11 17:24:11]

The CQ bit was checked by eae@chromium.org

[commit-bot: I haz the power, 2016-08-11 17:24:35]

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, 2016-08-11 18:58:14]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-11 18:59:57]

Description was changed from

==========
[LayoutNG] Add writing mode to NGDerivedConstraintSpace

Split NGDerivedConstraintSpace into a separate header and add direction
and writing mode fields. Also change it to use NGLogicalOffset and Size
instead of individual LayoutUnit fields for the offset and size values.

BUG=635619
R=cbiesinger@chromium.org
==========

to

==========
[LayoutNG] Add writing mode to NGDerivedConstraintSpace

Split NGDerivedConstraintSpace into a separate header and add direction
and writing mode fields. Also change it to use NGLogicalOffset and Size
instead of individual LayoutUnit fields for the offset and size values.

BUG=635619
R=cbiesinger@chromium.org

Committed: https://crrev.com/b76f8a89f3050ce49def73bc11fd08d055faf44c
Cr-Commit-Position: refs/heads/master@{#411389}
==========

[commit-bot: I haz the power, 2016-08-11 18:59:58]

Patchset 2 (id:??) landed as
https://crrev.com/b76f8a89f3050ce49def73bc11fd08d055faf44c
Cr-Commit-Position: refs/heads/master@{#411389}