Updating trunk VERSION from 3373.0 to 3374.0

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

Change-Id: If18e023f64654b3d5dcc2b5cb86649fb138c0d20
Reviewed-on: https://chromium-review.googlesource.com/967607Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543927}

chrome/VERSION

 MAJOR=67
 MINOR=0
-BUILD=3373
+BUILD=3374
 PATCH=0