chromium/content/test/data/accessibility/aria/aria-tooltip-expected-mac.txt

AXWebArea AXRoleDescription='HTML content'
++AXTextField AXRoleDescription='text field' accessibilityCustomContent=[{label: 'description', value: 'Your username should be your email id'}]
++AXGroup AXSubrole=AXUserInterfaceTooltip AXRoleDescription='tooltip' AXTitle='Your username should be your email id'
++++AXStaticText AXRoleDescription='text' AXValue='Your username should be your email id'