Updating trunk VERSION from 3473.0 to 3474.0

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

Change-Id: Idd5f6989b2f75f52715c634f37ab7ce57bdb2dd7
Reviewed-on: https://chromium-review.googlesource.com/1114270Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570314}

chrome/VERSION

 MAJOR=69
 MINOR=0
-BUILD=3473
+BUILD=3474
 PATCH=0