GitLab

This CL adds :
1 - Security icon and URL for the preview page
2 - Updates title of the page when navigated to another page

Bug: 1007499
Change-Id: I069e57e545907b2000eaebe996392d72da40d6b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1844341Reviewed-by: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Reviewed-by: Donn Denman <donnd@chromium.org>
Reviewed-by: Jinsuk Kim <jinsukkim@chromium.org>
Reviewed-by: Christopher Thompson <cthomp@chromium.org>
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705130}