[delete.html]
  [Deleting a property not in the css rule is a no-op]
    expected: FAIL

  [Deleting a property in the css rule removes it from the css rule]
    expected: FAIL

  [Deleting a custom property in the css rule removes it from the css rule]
    expected: FAIL

  [Deleting a list-valued property in the css rule removes it from the css rule]
    expected: FAIL

  [Declared StylePropertyMap.delete is not case-sensitive]
    expected: FAIL