chromium/third_party/blink/web_tests/fast/forms/date/date-with-csp-expected.html

<!DOCTYPE html>
<head>
<style>
#custom-icon::-webkit-calendar-picker-indicator {
  background-image: none;
}
</style>
</head>
<body>

<!-- no style for reference -->
<input type="date" />

<!-- date with custom icon blocked by CSP -->
<input type="data" id="custom-icon"/>

</body>