GitLab

While connecting to DevTools on localhost, try using IPv4 first,
since DevTools prefer IPv4 over IPv6.

Change-Id: I7e960789fe8268e850d4eb9cb9928ecc26cab8fa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2523468Reviewed-by: Shengfa Lin <shengfa@google.com>
Commit-Queue: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825630}