chore: bump chromium to 80.0.3987.31 (8-x-y) (#21557)
* chore: bump chromium in DEPS to 80.0.3987.16
* chore: bump chromium in DEPS to 80.0.3987.18
* chore: bump chromium in DEPS to 80.0.3987.20
* chore: bump chromium in DEPS to 80.0.3987.21
* chore: bump chromium in DEPS to 80.0.3987.22
* chore: bump chromium in DEPS to 80.0.3987.23
* chore: bump chromium in DEPS to 80.0.3987.24
* chore: bump chromium in DEPS to 80.0.3987.25
* chore: bump chromium in DEPS to 80.0.3987.26
* chore: bump chromium in DEPS to 80.0.3987.27
* chore: bump chromium in DEPS to 80.0.3987.28
* chore: bump chromium in DEPS to 80.0.3987.29
* chore: bump chromium in DEPS to 80.0.3987.30
* chore: bump chromium in DEPS to 80.0.3987.31