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chromium/content/test/data/accessibility/aria/aria-textbox-with-rich-text-expected-mac.txt 

AXWebArea AXRoleDescription='HTML content'
++AXGroup AXRoleDescription='group' AXValue='TextBox1'
++++AXHeading AXRoleDescription='heading' AXTitle='TextBox1' AXValue=1
++++++AXStaticText AXRoleDescription='text' AXValue='TextBox1'
++AXGroup AXRoleDescription='group' AXValue='TextBox2<newline>Some text.'
++++AXHeading AXRoleDescription='heading' AXTitle='TextBox2' AXValue=2
++++++AXStaticText AXRoleDescription='text' AXValue='TextBox2'
++++AXGroup AXRoleDescription='group'
++++++AXStaticText AXRoleDescription='text' AXValue='Some text.'