Chrome Version: (copy from 68.0.3440.106)
OS: Lubuntu 18.04

What steps will reproduce the problem?

Run this code: http://jsfiddle.net/4pqcexn5/

```css
#container {
  position: relative;
  border: 5px solid;
  padding-left: 100px;
}
#container > * {
  writing-mode: vertical-lr;
}
#abspos {
  position: absolute;
}
```
```html
<div id="container">
  <div id="abspos">abspos</div>
  <div id="static">static</div>
</div>
```

What is the expected result?

The abspos element has all 'top', 'left', 'bottom' and 'right' properties set to 'auto', so it should appear at the static position.
That is, the text 'abspos' should overlap 'static'.

What happens instead?

Instead of being shifted 100px to the right due to padding-left, it's shifted 100px downwards.
This happens when an absolutely (or fixed) positioned element has a different writing mode than its containing block.

WebKit is also affected (https://bugs.webkit.org/show_bug.cgi?id=189513), Firefox does it right.