chromium: 80.0.3987.162 -> 80.0.3987.163

https://chromereleases.googleblog.com/2020/04/stable-channel-update-for-desktop.html

Note: This update contains only two fixes [0]. The fix that reverts a
feature which caused a crash spike on 80.0.3987.162 [1] seems important
for us (though the commit doesn't provide any data on the crash spike).

[0]: https://chromium.googlesource.com/chromium/src/+log/80.0.3987.162..80.0.3987.163?pretty=fuller
[1]: https://chromium.googlesource.com/chromium/src/+/fc11c43603c05a9ef77430a6b4081a01969d2bf4