Explicitly forbid multiprofiles on the Active Directory devices.

chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc

Index: chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
index c72843a67ba76e34f70cacbe9f443f2036f9f079..0097395dc4d55cdfbe24f41a45b741894a51500e 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
@@ -298,6 +298,12 @@ user_manager::UserList ChromeUserManagerImpl::GetUsersAllowedForMultiProfile()
     return user_manager::UserList();
   }
 
+  // Multiprofile mode is not allowed on the Active Directory managed devices.
+  policy::BrowserPolicyConnectorChromeOS* connector =
+      g_browser_process->platform_part()->browser_policy_connector_chromeos();
+  if (connector->IsActiveDirectoryManaged())
+    return user_manager::UserList();
+
   user_manager::UserList result;
   const user_manager::UserList& users = GetUsers();
   for (user_manager::UserList::const_iterator it = users.begin();