Updating trunk VERSION from 3417.0 to 3418.0

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

Change-Id: I3dae1a3c23f259efc05a68d0ff2b80d5ea6ab039
Reviewed-on: https://chromium-review.googlesource.com/1038906Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#555297}

chrome/VERSION

 MAJOR=68
 MINOR=0
-BUILD=3417
+BUILD=3418
 PATCH=0