Sadly, this makes maintaining one test handling covering
exceptional circumstance very complex, so it was removed.

I've decoupled test that ensures that GetRemoteUrl works from
upload codepath.

R=ehmaldonado@chromium.org

Bug: 876910
Change-Id: I39de410c72d893e73492d5c3fc8f60a6ebc4f11f
Reviewed-on: https://chromium-review.googlesource.com/1186142Reviewed-by: Ryan Tseng <hinoka@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>