Updating trunk VERSION from 3915.0 to 3916.0

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

Change-Id: I4c4df1c63bf7f8c193fc7b3ff955493811d404ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1808176Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#697073}

chrome/VERSION

 MAJOR=79
 MINOR=0
-BUILD=3915
+BUILD=3916
 PATCH=0