Updating trunk VERSION from 4345.0 to 4346.0

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

Change-Id: I606e12df9cf0082cc9dec33e8d26cd4423b2a25d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2572731Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#833601}

chrome/VERSION

 MAJOR=89
 MINOR=0
-BUILD=4345
+BUILD=4346
 PATCH=0