Updating trunk VERSION from 3809.0 to 3810.0 and incrementing major version to 77

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

Change-Id: I07779066ddd480ead793ef2b1a36ffbdf81deb57
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1638002Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665039}

chrome/MAJOR_BRANCH_DATE

-MAJOR_BRANCH_DATE=2019-04-19
+MAJOR_BRANCH_DATE=2019-05-31

chrome/VERSION

-MAJOR=76
+MAJOR=77
 MINOR=0
-BUILD=3809
+BUILD=3810
 PATCH=0