Codebase Browser
chromium
Go to App

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

AXWebArea
++AXMenuBar
++++AXMenuItem AXLinkedUIElements=[:5] AXTitle='File'
++++AXMenuItem AXTitle='Edit'
++AXMenu AXDescription='File'
++++AXMenuItem AXTitle='New'
++++AXMenuItem AXTitle='Open'