Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/wpt_internal/css/css-ui/webkit-user-modify-all-revert.html 

<!DOCTYPE html>
<title>-webkit-user-modify not included in 'all'</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  #initial { all: initial; }
  #revert { all: revert; }
  #unset { all: unset; }
</style>
<div id="initial" contenteditable>Edit me</div>
<div id="revert" contenteditable>Edit me</div>
<div id="unset" contenteditable>Edit me</div>
<script>

  for (let subtest of ["initial", "revert", "unset"]) {
    test(() => {
      let selection = getSelection();
      let range = document.createRange();
      let element = document.getElementById(subtest);
      range.selectNode(element.firstChild);
      selection.removeAllRanges();
      selection.addRange(range);
      document.execCommand("delete");
      assert_equals(element.firstChild, null, "Text node deleted");
    }, "all:" + subtest + " does not turn off contenteditable");
  }
</script>