Updating trunk VERSION from 4077.0 to 4078.0

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

Change-Id: Ia9d9b134b9f1fb09a466e1a3c6ccce8a2968910f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2086555Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#746658}

chrome/VERSION

 MAJOR=82
 MINOR=0
-BUILD=4077
+BUILD=4078
 PATCH=0