chromium/content/test/data/accessibility/mac/attributes/ax-selected-children-expected.txt

list.accessibilityAttributeValue(selectedChildren)=[:4, :3, :5]
button.accessibilityAttributeValue(AXSelected)=0
div.accessibilityAttributeNames.has(AXSelectedChildren)='no'
div.accessibilityAttributeValue(AXSelectedChildren)=[]