[css-grid] Avoid serializing [] in grid-template* specified values

[Manuel Rego Casasnovas]

Any empty list of list items can be discarded when parsing grid-template-rows, grid-template-columns, etc.

This was discussed at: https://github.com/w3c/csswg-drafts/issues/4173

And this was fixed in Chromium in https://chromium-review.googlesource.com/c/chromium/src/+/1810454

This causes several failures in WPT tests under css/css-grid/parsing/

[Manuel Rego Casasnovas]

Created attachment 384313 [details]
Patch

[Oriol Brufau]

Comment on attachment 384313 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=384313&action=review

> Source/WebCore/ChangeLog:15
> +        Several WPT tets are passing thanks to this change.

Typo: tets

[Manuel Rego Casasnovas]

Created attachment 384316 [details]
Patch

[Manuel Rego Casasnovas]

Comment on attachment 384313 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=384313&action=review

>> Source/WebCore/ChangeLog:15
>> +        Several WPT tets are passing thanks to this change.
> 
> Typo: tets

Oops, thanks! Fixed that one and other typos on this ChangeLog.

[Manuel Rego Casasnovas]

View in context: https://bugs.webkit.org/attachment.cgi?id=384313&action=review

>> Source/WebCore/ChangeLog:15
>> +        Several WPT tets are passing thanks to this change.
> 
> Typo: tets

Oops, thanks! Fixed that one and other typos on this ChangeLog.

[Manuel Rego Casasnovas]

Comment on attachment 384316 [details]
Patch

After the patch for the tests import has landed this is ready for review.
It's a small thing we haven't ported from Blink yet.

[WebKit Commit Bot]

Comment on attachment 384316 [details]
Patch

Clearing flags on attachment: 384316

Committed r252883: <https://trac.webkit.org/changeset/252883>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/57488378>