Chrome Version: ToT
OS: Chrome OS

What steps will reproduce the problem?
(1) Build a debug build for veyron_minnie and deploy it to a minnie Chromebook.
(2) Log in, launch some apps.

What happens instead?
The logs contain a number of errors like:
* [ERROR:multi_user_window_manager_stub.cc(60)] Not implemented reached in virtual void chrome::MultiUserWindowManagerStub::RemoveObserver(chrome::MultiUserWindowManager::Observer *)
* [ERROR:multi_user_window_manager_stub.cc(19)] Not implemented reached in virtual void chrome::MultiUserWindowManagerStub::SetWindowOwner(aura::Window *, const AccountId &)