Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/fast/forms/calendar-picker/date-picker-month-appearance.html 

<!DOCTYPE html>
<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-1000">
<script src="../../../resources/testdriver.js"></script>
<script src="../../../resources/testdriver-vendor.js"></script>
<script src="../resources/common.js"></script>
<script src="../resources/picker-common.js"></script>
<script src="resources/calendar-picker-common.js"></script>

<input type=date value="10000-07-31">

<script>
  window.onload = openPickerAppearanceOnly(document.querySelector('input'),() => {
    clickMonthPopupButton();
    return new Promise(resolve => internals.pagePopupWindow.global.picker.monthPopupView.yearListView.element.addEventListener('webkitTransitionEnd', resolve));
  });
</script>