[css-grid] Fix definite/indefinite size detection for abspos elements

[css-grid] Fix definite/indefinite size detection for abspos elements

LayoutBox::percentageLogicalHeightIsResolvable() was not working fine
to check if a positioned grid container has definite/indefinite height.
The positioned grid container only has definite height when it has
a fixed height or the offset properties (top and bottom) are non-auto.

The patch fixes LayoutBox::computePercentageLogicalHeight()
to take this into account for grid items too.

BUG=538513
TEST=fast/css-grid-layout/flex-item-grid-container-percentage-rows.html

Committed: https://crrev.com/d9d2d58cf4978b88d19d5647040354a21ea6979b
Cr-Commit-Position: refs/heads/master@{#398728}

[Manuel Rego, 2016-06-08 20:40:10]

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

[Manuel Rego, 2016-06-08 20:40:11]

This has been extracted from:
https://codereview.chromium.org/2037383002/

[cbiesinger, 2016-06-08 20:52:39]

lgtm

[Manuel Rego, 2016-06-08 22:09:41]

The CQ bit was checked by rego@igalia.com

[commit-bot: I haz the power, 2016-06-08 22:10:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2047093004/1

[commit-bot: I haz the power, 2016-06-08 23:17:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-08 23:20:29]

Description was changed from

==========
[css-grid] Fix definite/indefinite size detection for abspos elements

LayoutBox::percentageLogicalHeightIsResolvable() was not working fine
to check if a positioned grid container has definite/indefinite height.
The positioned grid container only has definite height when it has
a fixed height or the offset properties (top and bottom) are non-auto.

The patch fixes LayoutBox::computePercentageLogicalHeight()
to take this into account for grid items too.

BUG=538513
TEST=fast/css-grid-layout/flex-item-grid-container-percentage-rows.html
==========

to

==========
[css-grid] Fix definite/indefinite size detection for abspos elements

LayoutBox::percentageLogicalHeightIsResolvable() was not working fine
to check if a positioned grid container has definite/indefinite height.
The positioned grid container only has definite height when it has
a fixed height or the offset properties (top and bottom) are non-auto.

The patch fixes LayoutBox::computePercentageLogicalHeight()
to take this into account for grid items too.

BUG=538513
TEST=fast/css-grid-layout/flex-item-grid-container-percentage-rows.html

Committed: https://crrev.com/d9d2d58cf4978b88d19d5647040354a21ea6979b
Cr-Commit-Position: refs/heads/master@{#398728}
==========

[commit-bot: I haz the power, 2016-06-08 23:20:30]

Patchset 1 (id:??) landed as
https://crrev.com/d9d2d58cf4978b88d19d5647040354a21ea6979b
Cr-Commit-Position: refs/heads/master@{#398728}