Updating trunk VERSION from 4067.0 to 4068.0

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

Change-Id: I926acdcc4a00ff4fdefafc03bc017a5e0b8a46c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2067152Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#743822}

chrome/VERSION

 MAJOR=82
 MINOR=0
-BUILD=4067
+BUILD=4068
 PATCH=0