Updating trunk VERSION from 4292.0 to 4293.0

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

Change-Id: Ibb217565c576fb9439e0e127e9da4d4302557cc5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2469717Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#816881}

chrome/VERSION

 MAJOR=88
 MINOR=0
-BUILD=4292
+BUILD=4293
 PATCH=0