chromium/content/test/data/accessibility/html/video-controls-expected-mac.txt

AXWebArea
++AXGroup
++++AXGroup AXDescription='Unable to play media.'
++++++AXGroup
++++++AXGroup
++++++++AXButton AXDescription='play'
++++++++++AXGroup
++++++++AXGroup
++++++++++AXGroup
++++++++++AXButton AXDescription='mute'
++++++++AXButton AXDescription='enter full screen'
++++++++++AXGroup
++++++++AXPopUpButton AXDescription='show more media controls' AXHasPopup=1 AXPopupValue='menu'
++++++++++AXGroup
++++++AXSlider AXDescription='video time scrubber' AXValue=0