Bug 304156 – Fix `column-rule-width` parsing and remove old border style rules

• Component: CSS
• Status: RESOLVED DUPLICATE

[Ahmad Saleem]

Hi Team

While looking into browser specific failures, I noticed that we fail following WPT:

WPT Test Case: https://wpt.fyi/results/css/css-multicol/parsing/column-rule-width-computed.html?label=master&label=experimental&aligned&q=column-rule-width

WPT Test Case Live Link: http://wpt.live/css/css-multicol/parsing/column-rule-width-computed.html

I already synced WPT here - https://github.com/WebKit/WebKit/pull/55348

Failing sub-test - column-rule-width is as specified when column-rule-style is none or hidden

____

WebKit Source: https://github.com/WebKit/WebKit/blob/0a7cb8948b067fa78de53b601b94552e112c7ca2/Source/WebCore/rendering/style/StyleMultiColData.cpp#L90

```
Style::LineWidth StyleMultiColData::columnRuleWidth() const
{
    if (columnRule.style() == BorderStyle::None || columnRule.style() == BorderStyle::Hidden)
        return Style::LineWidth { 0_css_px };
    return columnRule.width();
}

```

Changing it to:

```
Style::LineWidth StyleMultiColData::columnRuleWidth() const
{
    return columnRule.width();
}
```

It fixes the test case.

Just raising, so we can fix it.

Thanks!

[Radar WebKit Bug Importer]

<rdar://problem/166996498>

[Ahmad Saleem]

*** This bug has been marked as a duplicate of bug 304940 ***