Updating trunk VERSION from 3557.0 to 3558.0

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

Change-Id: I5445ed7b039684fe1479a8f20eadd25a6dcaa805
Reviewed-on: https://chromium-review.googlesource.com/1235226Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592671}

chrome/VERSION

 MAJOR=71
 MINOR=0
-BUILD=3557
+BUILD=3558
 PATCH=0