chromium/content/test/data/accessibility/display-locking/viewport-activation-expected-mac.txt

AXWebArea
++AXGroup
++++AXStaticText AXValue='initial spacer, will initially make everything below this far away from the viewport'
++AXGroup
++++AXStaticText AXValue='This text will get viewport-activated because it's in the viewport, and will be in AX tree with layout.'
++AXGroup
++++AXStaticText AXValue='This text is also in viewport.'
++AXGroup
++++AXStaticText AXValue='spacer so that everything below will be offscreen (and won't get viewport-activated)'
++AXGroup
++++AXStaticText AXValue='<newline>    This text will not get viewport-activated, and will be in AX tree but without layout.<newline>  '
++AXGroup
++++AXStaticText AXValue='doneActivating'