The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/42d24efdbeff42ab083b9d3b59ddb1a4753b370e

commit 42d24efdbeff42ab083b9d3b59ddb1a4753b370e
Author: khmel <khmel@chromium.org>
Date: Wed Dec 07 00:49:32 2016

arc: Fix double provisioning failure reporting.

In case a auth code request failure occurs, error is reported.
In many cases this causes Arc bridge stop and mojo close. On mojo
close Cancel exception is reported to Arc provision step. It itself
sends one more Unknown error that overrides previous error. This CL
ignore second and next error.

TEST=Manually on device. Emulate server error and instead unknown
     error server communication error is shown.
BUG=b/33347895
BUG= 671667 

Review-Url: https://codereview.chromium.org/2554743003
Cr-Commit-Position: refs/heads/master@{#436794}

[modify] https://crrev.com/42d24efdbeff42ab083b9d3b59ddb1a4753b370e/chrome/browser/chromeos/arc/arc_session_manager.cc
[modify] https://crrev.com/42d24efdbeff42ab083b9d3b59ddb1a4753b370e/chrome/browser/chromeos/arc/arc_session_manager.h
[modify] https://crrev.com/42d24efdbeff42ab083b9d3b59ddb1a4753b370e/chrome/browser/chromeos/arc/arc_session_manager_unittest.cc

Requesting merge once this fix is required for 668297

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a622acd40895de932bf7afda1f5f244085ad710d

commit a622acd40895de932bf7afda1f5f244085ad710d
Author: khmel <khmel@chromium.org>
Date: Wed Dec 07 21:39:01 2016

[Merge-M56] arc: Fix double provisioning failure reporting.

In case a auth code request failure occurs, error is reported.
In many cases this causes Arc bridge stop and mojo close. On mojo
close Cancel exception is reported to Arc provision step. It itself
sends one more Unknown error that overrides previous error. This CL
ignore second and next error.

TEST=Manually on device. Emulate server error and instead unknown
     error server communication error is shown.
BUG=b/33347895
BUG= 671667 
TBR=lhchavez@chromium.org
TBR=hidehiko@chromium.org
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2554743003
Cr-Commit-Position: refs/heads/master@{#436794}
(cherry picked from commit 42d24efdbeff42ab083b9d3b59ddb1a4753b370e)

Review-Url: https://codereview.chromium.org/2556273002
Cr-Commit-Position: refs/branch-heads/2924@{#390}
Cr-Branched-From: 3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}

[modify] https://crrev.com/a622acd40895de932bf7afda1f5f244085ad710d/chrome/browser/chromeos/arc/arc_auth_service.cc
[modify] https://crrev.com/a622acd40895de932bf7afda1f5f244085ad710d/chrome/browser/chromeos/arc/arc_auth_service.h
[modify] https://crrev.com/a622acd40895de932bf7afda1f5f244085ad710d/chrome/browser/chromeos/arc/arc_auth_service_unittest.cc