Updating trunk VERSION from 3685.0 to 3686.0

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

Change-Id: I4a1afcfb095ed6e61183c9b22dad0bb1ca10d331
Reviewed-on: https://chromium-review.googlesource.com/c/1438454Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626373}

chrome/VERSION

 MAJOR=74
 MINOR=0
-BUILD=3685
+BUILD=3686
 PATCH=0