GitLab

Show error message for URLs with invalid schemes, and remove leftover
function that was removed.

Bug: 906607
Change-Id: I6cd5a7267de3d439c1e54c01f846f03fd9247f62
Reviewed-on: https://chromium-review.googlesource.com/c/1343365Reviewed-by: Ramya Nagarajan <ramyan@chromium.org>
Commit-Queue: Kristi Park <kristipark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611388}