The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8b9e9fcb9eb5c2408d8488f2f619b51ff24d0470

commit 8b9e9fcb9eb5c2408d8488f2f619b51ff24d0470
Author: drcrash <drcrash@chromium.org>
Date: Fri Apr 28 14:17:27 2017

Allow machine key challenges by signin profiles.

This allows calling chrome.enterprise.platformKeys.challengeMachineKey() from a profile that does not have a user associated with it.

BUG=715121
TEST=unit tests

Review-Url: https://codereview.chromium.org/2841553002
Cr-Commit-Position: refs/heads/master@{#467991}

[modify] https://crrev.com/8b9e9fcb9eb5c2408d8488f2f619b51ff24d0470/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api.cc
[modify] https://crrev.com/8b9e9fcb9eb5c2408d8488f2f619b51ff24d0470/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api.h
[modify] https://crrev.com/8b9e9fcb9eb5c2408d8488f2f619b51ff24d0470/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2691676080f805e1b532f40ef3ef70dea8df8ac0

commit 2691676080f805e1b532f40ef3ef70dea8df8ac0
Author: drcrash <drcrash@chromium.org>
Date: Fri Apr 28 16:16:58 2017

Ensure that challenging user keys is unavailable on signin.

Returns a specific error saying the keys are not available in the
signin profile.

BUG=715121
TEST=unit tests

Review-Url: https://codereview.chromium.org/2838423003
Cr-Commit-Position: refs/heads/master@{#468019}

[modify] https://crrev.com/2691676080f805e1b532f40ef3ef70dea8df8ac0/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api.cc
[modify] https://crrev.com/2691676080f805e1b532f40ef3ef70dea8df8ac0/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api.h
[modify] https://crrev.com/2691676080f805e1b532f40ef3ef70dea8df8ac0/chrome/browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api_unittest.cc

drcrash@ could you please help us with any repro steps and expected behavior to verify this fix from TE-End.


Thank You...