Updating trunk VERSION from 3714.0 to 3715.0

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

Change-Id: I340703d1ec143fb45cb1be12e797b3ee2b0446d4
Reviewed-on: https://chromium-review.googlesource.com/c/1482147Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634538}

chrome/VERSION

 MAJOR=74
 MINOR=0
-BUILD=3714
+BUILD=3715
 PATCH=0