Updating trunk VERSION from 4114.0 to 4115.0

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

Change-Id: I3057ee2bbc3c37113c3a7bf02d5b4cb7ab4fa276
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2147928Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#758702}

chrome/VERSION

 MAJOR=84
 MINOR=0
-BUILD=4114
+BUILD=4115
 PATCH=0