GitLab

This change adds additional network diagnostic routines to the
connectivity diagnostics application:
  - HTTP Firewall
  - HTTPS Firewall
  - HTTPS Latency

Bug: chromium:1142857
Change-Id: I67810a58203d8eb45a5f75c94c5d3179b9627530
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2530593Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Trent Begin <tbegin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826955}