Updating trunk VERSION from 3587.0 to 3588.0

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

Change-Id: I4859bb33a11bff11c65a9568155e3fb114039193
Reviewed-on: https://chromium-review.googlesource.com/c/1292381Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601407}

chrome/VERSION

 MAJOR=72
 MINOR=0
-BUILD=3587
+BUILD=3588
 PATCH=0