Updating trunk VERSION from 3799.0 to 3800.0

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

Change-Id: Iceeb1a7e2a7426a3f04a8e562851431b877a5716
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1619067Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661202}

chrome/VERSION

 MAJOR=76
 MINOR=0
-BUILD=3799
+BUILD=3800
 PATCH=0