Updating trunk VERSION from 4303.0 to 4304.0

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

Change-Id: Id77ce1903702ce898eaaab6ea8446990264be9b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2496862Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#820597}

chrome/VERSION

 MAJOR=88
 MINOR=0
-BUILD=4303
+BUILD=4304
 PATCH=0