Updating trunk VERSION from 4273.0 to 4274.0

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

Change-Id: Ia3528bd03480f080027975fa31b3dfd1f86a887e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427869Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#810077}

chrome/VERSION

 MAJOR=87
 MINOR=0
-BUILD=4273
+BUILD=4274
 PATCH=0