PSA: Event.path has been disabled in pre-Beta channels

[Xiaocheng Hu]

Hi,

As part of the deprecation process, we have disabled the non-standard API Event.path by default on Canary and Dev channels, as well as developer builds. It will remain enabled by default in Beta and Stable channels until the final removal (in M109 as currently planned).

The change is made in Chromium source code, so it may also affect embedders.

See also:

- Code change: crrev.com/c/3662186

- Intent to deprecate: https://groups.google.com/a/chromium.org/g/blink-dev/c/UYY2TRSL8_k/m/rbgamivQBgAJ

Regards,

Xiaocheng