Updating trunk VERSION from 3923.0 to 3924.0

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

Change-Id: I51308e06b84dcacd4e4f095f78e0f9240ebb1a67
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1824541Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#699608}

chrome/VERSION

 MAJOR=79
 MINOR=0
-BUILD=3923
+BUILD=3924
 PATCH=0