Updating trunk VERSION from 3848.0 to 3849.0

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

Change-Id: I17a41ea1ad3a58d2ef2ae1a095321a0adf70d655
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1691944
Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#675510}