Updating trunk VERSION from 3656.0 to 3657.0

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

Change-Id: I297a721287f299796ffa9853e1b88adf96f44f82
Reviewed-on: https://chromium-review.googlesource.com/c/1392752Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619262}

chrome/VERSION

 MAJOR=73
 MINOR=0
-BUILD=3656
+BUILD=3657
 PATCH=0