Migrate dom distiller to SimpleURLLoader

BUG=838955

TBR=noyau@chromium.org (one line in ios/chrome/browser/dom_distiller/dom_distiller_service_factory.cc)

Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I050dbe74fc7ccd7b7811a5532abc931fda189177
Reviewed-on: https://chromium-review.googlesource.com/1140973
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576047}
12 files changed