Add JS externs for conversion measurement javascript API. https://github.com/WICG/conversion-measurement-api
Add JS externs for conversion measurement javascript API.
https://github.com/WICG/conversion-measurement-api

PiperOrigin-RevId: 359636492

monetate/closure-compiler,nawawi/closure-compiler,monetate/closure-compiler,google/closure-compiler,nawawi/closure-compiler,ChadKillingsworth/closure-compiler,google/closure-compiler,google/closure-compiler,ChadKillingsworth/closure-compiler,monetate/closure-compiler,google/closure-compiler,nawawi/closure-compiler,nawawi/closure-compiler,monetate/closure-compiler,ChadKillingsworth/closure-compiler,ChadKillingsworth/closure-compiler