Updating trunk VERSION from 3421.0 to 3422.0

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

Change-Id: Ib61604b0d23d143b58788290519da3645b10d43b
Reviewed-on: https://chromium-review.googlesource.com/1045793Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556300}

chrome/VERSION

 MAJOR=68
 MINOR=0
-BUILD=3421
+BUILD=3422
 PATCH=0