Replace chromeos::UserManager::Get() with chromeos::GetUserManager().

chrome/browser/chromeos/login/auth/login_performer.cc

Index: chrome/browser/chromeos/login/auth/login_performer.cc
diff --git a/chrome/browser/chromeos/login/auth/login_performer.cc b/chrome/browser/chromeos/login/auth/login_performer.cc
index dcf2cde265f2bf34d41425672069f79b0ae2a9bc..146f612f1d6f0ed28b3c95aff120bb81a1b782ac 100644
--- a/chrome/browser/chromeos/login/auth/login_performer.cc
+++ b/chrome/browser/chromeos/login/auth/login_performer.cc
@@ -221,7 +221,7 @@ void LoginPerformer::LoginAsLocallyManagedUser(
     return;
   }
 
-  if (!UserManager::Get()->AreLocallyManagedUsersAllowed()) {
+  if (!GetUserManager()->AreLocallyManagedUsersAllowed()) {
     LOG(ERROR) << "Login attempt of locally managed user detected.";
     delegate_->WhiteListCheckFailed(user_context.GetUserID());
     return;
@@ -230,11 +230,11 @@ void LoginPerformer::LoginAsLocallyManagedUser(
   SupervisedUserLoginFlow* new_flow =
       new SupervisedUserLoginFlow(user_context.GetUserID());
   new_flow->set_host(
-      UserManager::Get()->GetUserFlow(user_context.GetUserID())->host());
-  UserManager::Get()->SetUserFlow(user_context.GetUserID(), new_flow);
+      GetUserManager()->GetUserFlow(user_context.GetUserID())->host());
+  GetUserManager()->SetUserFlow(user_context.GetUserID(), new_flow);
 
-  SupervisedUserAuthentication* authentication = UserManager::Get()->
-      GetSupervisedUserManager()->GetAuthentication();
+  SupervisedUserAuthentication* authentication =
+      GetUserManager()->GetSupervisedUserManager()->GetAuthentication();
 
   UserContext user_context_copy = authentication->TransformKey(user_context);