Updating trunk VERSION from 3446.0 to 3447.0

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

Change-Id: I61efbd5d0e3670efc8d998f69fd29012d2feec76
Reviewed-on: https://chromium-review.googlesource.com/1080251Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563135}

chrome/VERSION

 MAJOR=69
 MINOR=0
-BUILD=3446
+BUILD=3447
 PATCH=0