Updating trunk VERSION from 3273.0 to 3274.0

TBR=govind@chromium.org

Change-Id: I3dfc18ff22d4cfcef352641c20fbcd0c46907cbf
Reviewed-on: https://chromium-review.googlesource.com/777928Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517729}

chrome/VERSION

 MAJOR=64
 MINOR=0
-BUILD=3273
+BUILD=3274
 PATCH=0