Revert "Reland "Squash top level error code returned from host resolver.""

This reverts commit 71a290c2dcb026623688aa6d54341190f5854c6e.

Reason for revert: Suspected cause of failures in WizardController* tests on chromeos:
https://ci.chromium.org/p/chrome/builders/ci/linux-chromeos-chrome/1413
https://ci.chromium.org/p/chromium/builders/ci/linux-chromeos-dbg/16312
https://ci.chromium.org/p/chromium/builders/ci/linux-chromeos-rel/33460

Original change's description:
> Reland "Squash top level error code returned from host resolver."
> 
> This is a reland of 834f2092e57f27221a8d89d948485982d82a716b
> 
> Original change's description:
> > Squash top level error code returned from host resolver.
> >
> > If the host resolution process fails, the top level error code should
> > now be only ERR_NAME_NOT_RESOLVED. A more specific error code (e.g.
> > ERR_CONNECTION_REFUSED if a secure mode DoH server was offline) may be
> > found in ResolveErrorInfo.
> >
> > Bug: 1016325
> > Change-Id: I9f5f857fffd71be6485d05280239cd0b649d7a8f
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1974678
> > Commit-Queue: Katharine Daly <dalyk@google.com>
> > Reviewed-by: Matt Menke <mmenke@chromium.org>
> > Reviewed-by: John Abd-El-Malek <jam@chromium.org>
> > Reviewed-by: Eric Orth <ericorth@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#728725}
> 
> Bug: 1016325, 1039639
> Change-Id: Ifcf5d1c8d3e5558e81b9efc784d234d034ee9a52
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1990249
> Reviewed-by: John Abd-El-Malek <jam@chromium.org>
> Reviewed-by: Matt Menke <mmenke@chromium.org>
> Commit-Queue: Katharine Daly <dalyk@google.com>
> Cr-Commit-Position: refs/heads/master@{#729518}

TBR=jam@chromium.org,mmenke@chromium.org,ericorth@chromium.org,dalyk@google.com

Change-Id: If09e8178659f5d47503ccee5cb8919d099b2330a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1016325, 1039639
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1992812
Reviewed-by: Fabrice de Gans-Riberi <fdegans@chromium.org>
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#729582}
9 files changed