Roll ChromeOS Silvermont AFDO profile from...

Roll ChromeOS Silvermont AFDO profile from 86-4183.74-1598267562-benchmark-87.0.4247.0-r1 to 87-4183.84-1598867895-benchmark-87.0.4247.0-r1

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/cros-afdo-silvermont-chromium
Please CC c-compiler-chrome@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Tbr: c-compiler-chrome@google.com
Change-Id: Ica9d3a5a48e3dbe074836bacefef6f702fc53681
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2387371Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#803404}

chromeos/profiles/silvermont.afdo.newest.txt

-chromeos-chrome-amd64-silvermont-86-4183.74-1598267562-benchmark-87.0.4247.0-r1-redacted.afdo.xz
+chromeos-chrome-amd64-silvermont-87-4183.84-1598867895-benchmark-87.0.4247.0-r1-redacted.afdo.xz