And also for AuthPolicyClient in Chrome.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform2/+/a8a56ab06dda94b5fd41ccf91e90bbf8f983881b

commit a8a56ab06dda94b5fd41ccf91e90bbf8f983881b
Author: Roman Sorokin <rsorokin@chromium.org>
Date: Thu Dec 29 14:54:02 2016

Use prefixed object guid as id for Active Directory accounts.

BUG= chromium:677497 
TEST=SessionManagerImplStaticTest.AccountIdKeyTest,manual
Change-Id: Id4c25cc23d49d66b4a261aa23beec2577c81fc3b
Reviewed-on: https://chromium-review.googlesource.com/422204
Commit-Ready: Roman Sorokin <rsorokin@chromium.org>
Tested-by: Roman Sorokin <rsorokin@chromium.org>
Reviewed-by: Lutz Justen <ljusten@chromium.org>
Reviewed-by: Roman Sorokin <rsorokin@chromium.org>

[modify] https://crrev.com/a8a56ab06dda94b5fd41ccf91e90bbf8f983881b/authpolicy/dbus_bindings/org.chromium.AuthPolicy.xml
[modify] https://crrev.com/a8a56ab06dda94b5fd41ccf91e90bbf8f983881b/authpolicy/samba_interface.cc
[modify] https://crrev.com/a8a56ab06dda94b5fd41ccf91e90bbf8f983881b/login_manager/session_manager_impl.cc
[modify] https://crrev.com/a8a56ab06dda94b5fd41ccf91e90bbf8f983881b/authpolicy/samba_interface.h
[modify] https://crrev.com/a8a56ab06dda94b5fd41ccf91e90bbf8f983881b/login_manager/session_manager_impl_unittest.cc
[modify] https://crrev.com/a8a56ab06dda94b5fd41ccf91e90bbf8f983881b/login_manager/session_manager_impl.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/65de674cb37522bb78bfe5f0f29a0f9899384d8b

commit 65de674cb37522bb78bfe5f0f29a0f9899384d8b
Author: rsorokin <rsorokin@chromium.org>
Date: Fri Jan 13 13:43:05 2017

Use AccountIdKey to identify Active Directory accounts.

It ties SessionManager, AuthPolicy, Cryptohome

BUG= 677497 
TEST=manual

Review-Url: https://codereview.chromium.org/2601283002
Cr-Commit-Position: refs/heads/master@{#443547}

[modify] https://crrev.com/65de674cb37522bb78bfe5f0f29a0f9899384d8b/chromeos/dbus/auth_policy_client.cc
[modify] https://crrev.com/65de674cb37522bb78bfe5f0f29a0f9899384d8b/chromeos/login/auth/cryptohome_authenticator.cc