[css-grid] mimax(auto, <flex>) should be serialized as <flex>

[css-grid] mimax(auto, <flex>) should be serialized as <flex>

Add a simple if to serialize properly this case.

Add new test case to verify it. We can only check it
using grid-auto-columns|rows, because grid-template-columns|rows
is serialized to the used breadth.

BUG=660675
Committed: https://crrev.com/7e941579065975fa2644e2e0d14d96b4e52312bd
Cr-Commit-Position: refs/heads/master@{#429252}

[Manuel Rego, 2016-11-02 10:19:38]

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

[svillar, 2016-11-02 10:46:44]

lgtm

[Manuel Rego, 2016-11-02 10:49:32]

The CQ bit was checked by rego@igalia.com

[commit-bot: I haz the power, 2016-11-02 10:49:43]

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, 2016-11-02 12:08:39]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-02 12:10:55]

Description was changed from

==========
[css-grid] mimax(auto, <flex>) should be serialized as <flex>

Add a simple if to serialize properly this case.

Add new test case to verify it. We can only check it
using grid-auto-columns|rows, because grid-template-columns|rows
is serialized to the used breadth.

BUG=660675
==========

to

==========
[css-grid] mimax(auto, <flex>) should be serialized as <flex>

Add a simple if to serialize properly this case.

Add new test case to verify it. We can only check it
using grid-auto-columns|rows, because grid-template-columns|rows
is serialized to the used breadth.

BUG=660675

Committed: https://crrev.com/7e941579065975fa2644e2e0d14d96b4e52312bd
Cr-Commit-Position: refs/heads/master@{#429252}
==========

[commit-bot: I haz the power, 2016-11-02 12:10:56]

Patchset 1 (id:??) landed as
https://crrev.com/7e941579065975fa2644e2e0d14d96b4e52312bd
Cr-Commit-Position: refs/heads/master@{#429252}