chromium/content/test/data/accessibility/mac/attributes/ax-loading-progress.html

<!--
@SCRIPT:
  document.accessibilityAttributeNames.has(AXLoadingProgress)
  document.accessibilityAttributeValue(AXLoadingProgress)
  not_applicable.accessibilityAttributeNames.has(AXLoadingProgress)
  // Test of AccessibilityAttributeValue for "not applicable" element is
  // necessary because the value can be requested.
  not_applicable.accessibilityAttributeValue(AXLoadingProgress)
-->
<!DOCTYPE html>
<div id="not_applicable">