The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c02048ed977c8c8b8e685f764da72c37ad7bfbeb

commit c02048ed977c8c8b8e685f764da72c37ad7bfbeb
Author: Antonio Gomes <tonikitoo@igalia.com>
Date: Mon Sep 10 22:21:17 2018

[chromeos] Migrate AttestationCAClient to SimpleURLLoader

URLFetcher will stop working with advent of Network Service, and
SimpleURLLoader is the replacement API for most clients.
This CL migrates chromeos::chromeos::AttestationCAClient and the
respective unittests away from URLFetcher.

BUG=773295, 879782 

Change-Id: I9ccdad3a73108ad3e3e7ab4f148b93048433b3bd
Reviewed-on: https://chromium-review.googlesource.com/1202223
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590089}
[modify] https://crrev.com/c02048ed977c8c8b8e685f764da72c37ad7bfbeb/chrome/browser/chromeos/attestation/attestation_ca_client.cc
[modify] https://crrev.com/c02048ed977c8c8b8e685f764da72c37ad7bfbeb/chrome/browser/chromeos/attestation/attestation_ca_client.h
[modify] https://crrev.com/c02048ed977c8c8b8e685f764da72c37ad7bfbeb/chrome/browser/chromeos/attestation/attestation_ca_client_unittest.cc