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chromium/content/test/data/accessibility/html/input-range-expected-mac.txt 

AXWebArea
++AXGroup
++++AXSlider AXValue=5
++++AXSlider AXValue=3
++++AXSlider AXValue=5
++++AXSlider AXValue=5
++++AXSlider AXValue=0
++++AXSlider AXValue=50