Updating trunk VERSION from 3472.0 to 3473.0

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

Change-Id: I4f14e4a000e63e1381103dc9c3c4768b235e7634
Reviewed-on: https://chromium-review.googlesource.com/1112972Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569953}

chrome/VERSION

 MAJOR=69
 MINOR=0
-BUILD=3472
+BUILD=3473
 PATCH=0