Updating trunk VERSION from 3479.0 to 3480.0

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

Change-Id: I1a07ccfa66caa3431525494addb2851d546046b9
Reviewed-on: https://chromium-review.googlesource.com/1121898Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571809}

chrome/VERSION

 MAJOR=69
 MINOR=0
-BUILD=3479
+BUILD=3480
 PATCH=0