Updating trunk VERSION from 3790.0 to 3791.0

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

Change-Id: I9c57610d7343732658c543af328ec9ed7cd76843
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1604470Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658386}

chrome/VERSION

 MAJOR=76
 MINOR=0
-BUILD=3790
+BUILD=3791
 PATCH=0