Updating trunk VERSION from 4304.0 to 4305.0

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

Change-Id: I5a4ad404174e5f76b493c2744377481477d0c4c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2497469Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#820660}

chrome/VERSION

 MAJOR=88
 MINOR=0
-BUILD=4304
+BUILD=4305
 PATCH=0