Updating trunk VERSION from 4115.0 to 4116.0

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

Change-Id: Ib75716cf8070b3e2b0a91b818fa8317696076c8f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2150186Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#759119}

chrome/VERSION

 MAJOR=84
 MINOR=0
-BUILD=4115
+BUILD=4116
 PATCH=0