Updating trunk VERSION from 3598.0 to 3599.0

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

Change-Id: Ib4878c92255a84bac7f1fceda59bf73f0bd93694
Reviewed-on: https://chromium-review.googlesource.com/c/1312154Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604502}

chrome/VERSION

 MAJOR=72
 MINOR=0
-BUILD=3598
+BUILD=3599
 PATCH=0