Updating trunk VERSION from 4393.0 to 4394.0

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

Change-Id: Idb6f4477661f20d91cfcdbab48bda80dd3c6f3a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2636773Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#844660}

chrome/VERSION

 MAJOR=90
 MINOR=0
-BUILD=4393
+BUILD=4394
 PATCH=0