Updating trunk VERSION from 4158.0 to 4159.0

# This is an automated release commit.
# Do not revert without consulting chrome-pmo@google.com.
NOAUTOREVERT=true
TBR=kariah@chromium.org

Change-Id: I68b71c8bbcdb63a99ae8c2395fc072dc37c284bf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2219390Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#772541}

chrome/VERSION

 MAJOR=85
 MINOR=0
-BUILD=4158
+BUILD=4159
 PATCH=0