Updating trunk VERSION from 3815.0 to 3816.0

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

Change-Id: I1e57839dbe9ed8d1887a6f6ecc3686bf275df315
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1643683Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#666150}

chrome/VERSION

 MAJOR=77
 MINOR=0
-BUILD=3815
+BUILD=3816
 PATCH=0