Remove LOAD_DO_NOT_* credentials flags and replace them with allow_credentials,
in cases with no behavior change.

This CL is part of a larger project to remove the LOAD_DO_NOT_* privacy load
flags and replace them with the allow_credentials setting. See
https://crbug.com/799935,
https://docs.google.com/document/d/1ntn9N7Ce2jozvvpWI0XbzJ7lJdwUjJXK07wp7rxrIN4,
and
go/allow-credentials-tracker
for the motivation and progress of this change.

This CL handles cases where all three load flags were set. allow_credentials =
false sets all three load flags on the URLRequest, so this CL is meant to be a
no-op from the perspective of the network.

CQ_INCLUDE_TRYBOTS=luci.chrome.try:linux-chromeos-chrome

Bug: 799935
Change-Id: Ife532232ae35df2e5d6face8f528d843257df420
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1443976
Reviewed-by: Matt Menke <mmenke@chromium.org>
Reviewed-by: Michael Martis <martis@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Roger Tawa <rogerta@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Reviewed-by: Tim Volodine <timvolodine@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Commit-Queue: Jesse Selover <jselover@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654301}
29 files changed