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

<!DOCTYPE html>
<head>
<style>
#custom-icon::-webkit-calendar-picker-indicator {
  background-image: -webkit-image-set(url(resources/time_icon.svg) 1x);
}
</style>
<link rel="match" href="date-with-csp-expected.html">
<meta http-equiv="content-security-policy" content="default-src 'none'">
</head>
<body>

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

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

</body>