Updating trunk VERSION from 3686.0 to 3687.0

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

Change-Id: Icb70b334ef0da71d912b416f6e27bae3eb66fd34
Reviewed-on: https://chromium-review.googlesource.com/c/1438464Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626440}

chrome/VERSION

 MAJOR=74
 MINOR=0
-BUILD=3686
+BUILD=3687
 PATCH=0