Updating trunk VERSION from 3603.0 to 3604.0

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

Change-Id: I06691e83b83420cc54891b0ad95c123470fca502
Reviewed-on: https://chromium-review.googlesource.com/c/1319172Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605590}

chrome/VERSION

 MAJOR=72
 MINOR=0
-BUILD=3603
+BUILD=3604
 PATCH=0