M150 will be the last Chromium release to support macOS 12

[Avi Drissman]

The Chrome Mac team has determined that M150 will be the final release of Chromium to support macOS 12. M151 will require at least macOS 13.

https://crbug.com/473856753 is the umbrella parent bug tracking this effort, with https://crbug.com/473856754 tracking code removal when this happens.

Avi

(on behalf of the Google Chrome Mac team)