Updating trunk VERSION from 3814.0 to 3815.0

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

Change-Id: I54c33c9ad552806282c557d17921eb86ae36e03b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1642791Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665794}

chrome/VERSION

 MAJOR=77
 MINOR=0
-BUILD=3814
+BUILD=3815
 PATCH=0