Updating trunk VERSION from 3981.0 to 3982.0

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

Change-Id: I0ae629366a8db4d5944ab3645e97b86d18f71fcf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1943755Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#720306}

chrome/VERSION

 MAJOR=80
 MINOR=0
-BUILD=3981
+BUILD=3982
 PATCH=0