Issue 844954  has been merged into this issue.

I am going to get started on this.

Patch out for review: https://chromium-review.googlesource.com/c/chromium/src/+/1123275

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8ff7e49343820eee1fb29c33b3441296c7022f6e

commit 8ff7e49343820eee1fb29c33b3441296c7022f6e
Author: Reilly Grant <reillyg@chromium.org>
Date: Tue Jul 10 20:28:35 2018

Port quirks::QuirksClient to network::SimpleURLLoader

Bug:  844953 
Change-Id: I5a36a254228e1f5a13e1b24a11875f79be330464
Reviewed-on: https://chromium-review.googlesource.com/1123275
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Maks Orlovich <morlovich@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573887}
[modify] https://crrev.com/8ff7e49343820eee1fb29c33b3441296c7022f6e/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
[modify] https://crrev.com/8ff7e49343820eee1fb29c33b3441296c7022f6e/chrome/browser/chromeos/display/quirks_browsertest.cc
[modify] https://crrev.com/8ff7e49343820eee1fb29c33b3441296c7022f6e/components/quirks/BUILD.gn
[modify] https://crrev.com/8ff7e49343820eee1fb29c33b3441296c7022f6e/components/quirks/DEPS
[modify] https://crrev.com/8ff7e49343820eee1fb29c33b3441296c7022f6e/components/quirks/quirks_client.cc
[modify] https://crrev.com/8ff7e49343820eee1fb29c33b3441296c7022f6e/components/quirks/quirks_client.h
[modify] https://crrev.com/8ff7e49343820eee1fb29c33b3441296c7022f6e/components/quirks/quirks_manager.cc
[modify] https://crrev.com/8ff7e49343820eee1fb29c33b3441296c7022f6e/components/quirks/quirks_manager.h