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chromium/third_party/blink/web_tests/external/wpt/css/css-backgrounds/border-image-width-should-extend-to-padding-ref.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>
  `border-image-width` should extend into padding given an empty border area via `border-style: none`
</title>
<style>
    div {
        width: 136px;
        height: 136px;
        margin: 20px;
        background-color: silver;
        border-image-source: linear-gradient(blue, orange);
        border-image-slice: 32;
        border-image-repeat: repeat;
        border-style: solid;
        border-width: 32px;
    }
</style>

Test passes if a 200x200px (content + padding + border) box with a 32px border-image is rendered.
<div></div>