layout/forms/crashtests/1471157.html


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<!doctype html>
<input type="file">
<script>
  onload = function() {
    var input = document.querySelector("input");
    console.log(input.offsetWidth);  // Force layout flush and hence layout box
                                     // creation.
    input.dispatchEvent(new DragEvent("drop"));
  }
</script>