Updating trunk VERSION from 3227.0 to 3228.0

TBR=amineer@chromium.org

Change-Id: I53dfcf0bbc2d01fd99770f6e30a80d589791add5
Reviewed-on: https://chromium-review.googlesource.com/691320Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505270}

chrome/VERSION

 MAJOR=63
 MINOR=0
-BUILD=3227
+BUILD=3228
 PATCH=0