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chromium/content/test/data/accessibility/mac/attributes/ax-access-key-expected.txt 

focusable.accessibilityAttributeNames.has(AXAccessKey)='yes'
focusable.accessibilityAttributeValue(AXAccessKey)='s'
restriction.accessibilityAttributeNames.has(AXAccessKey)='yes'
restriction.accessibilityAttributeValue(AXAccessKey)='s'
invalid.accessibilityAttributeNames.has(AXAccessKey)='no'
invalid.accessibilityAttributeValue(AXAccessKey)='s'
not_applicable.accessibilityAttributeNames.has(AXAccessKey)='no'
not_applicable.accessibilityAttributeValue(AXAccessKey)='s'