commit 78579c71b9013a88936d31b6ac4ce4b18b0ac339
author rego <rego@igalia.com> Thu Sep 08 20:37:01 2016
committer Commit bot <commit-bot@chromium.org> Thu Sep 08 20:40:40 2016
tree 35eb6f1c37c696ec9f5626a1f44d377df36511fa
parent 3e588a3a87498f27636ff610a0cbf961f99d41b1

[css-grid] Allow percentage values for column and row gutters

The grid-column-gap and grid-row-gap allow now percentage as one of the
possible values. This patch adds the required support for both parsing
and layout logic.

This is based on a patch by Javier Fernández http://crrev.com/2057113002/.
However it uses a different approach to compute the percentage gaps
based on the sizing operation.
During intrinsic size phase the percentage gaps are considered 0px.
Also for indefinite heights the percentage row gaps are 0px too.

BUG=615248
TEST=fast/css-grid-layout/grid-gutters-as-percentage.html

Review-Url: https://codereview.chromium.org/2323793002
Cr-Commit-Position: refs/heads/master@{#417386}