Given we now have https://github.com/saschanaz/gecko-webidl (I need to move that to mozilla org) and https://github.com/saschanaz/bcd-idl-mapper, I think I can create a tool that analyzes MDN browser support data and automatically add InstrumentedProps attributes for missing members.
Bug 1576757 Comment 13 Edit History
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Given we now have https://github.com/saschanaz/gecko-webidl (I need to move that to mozilla org) and https://github.com/saschanaz/bcd-idl-mapper, I think I can create a tool that analyzes MDN browser compat data and automatically add InstrumentedProps attributes for missing members.