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chromium/third_party/blink/web_tests/fast/forms/select-popup/popup-menu-appearance-zoom110.html 

<!DOCTYPE html>
<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-100">
<script src="../../../resources/testdriver.js"></script>
<script src="../../../resources/testdriver-vendor.js"></script>
<script src="../resources/picker-common.js"></script>

<body style="zoom:1.1;">
<p>There is no whitespace at the bottom of the popup in 110% zoom level.</p>
<!-- TODO(tkent): The pixel result on Linux has unexpected scroll bar.  We
  -- should understand the cause.  The scrollbar doesn't appear on content_shell
  -- and chrome.  So, it's not a serious issue. -->
<select style="font-size: 12px; font-family: 'Segoe UI', Tahoma, sans-serif; width: 145.455px;">
  <option>25%</option>
  <option>33%</option>
  <option>50%</option>
  <option>67%</option>
  <option>75%</option>
  <option>90%</option>
  <option>100%</option>
  <option>110%</option>
  <option>125%</option>
  <option>150%</option>
  <option>175%</option>
  <option>200%</option>
  <option>250%</option>
  <option>300%</option>
  <option>400%</option>
  <option>500%</option>
</select>

<script>
  window.onload = openPickerAppearanceOnly(document.querySelector('select'));
</script>