Updating trunk VERSION from 4269.0 to 4270.0

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

Change-Id: Iab7eba78f705e66862490e0d8abd8f094f5f54c2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2419719Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#808728}

chrome/VERSION

 MAJOR=87
 MINOR=0
-BUILD=4269
+BUILD=4270
 PATCH=0