This CL replaces user_manager::UserID with AccountId.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/chrome_browser_main_chromeos.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
@@ skipping 450 matching lines @@
       ShouldAutoLaunchKioskApp(parsed_command_line())) {
     WizardController::SetZeroDelays();
   }
 
   power_prefs_.reset(new PowerPrefs(PowerPolicyController::Get()));
 
   // In Aura builds this will initialize ash::Shell.
   ChromeBrowserMainPartsLinux::PreProfileInit();
 
   if (immediate_login) {
-    const std::string user_id = login::CanonicalizeUserID(
+    const std::string user_email = login::CanonicalizeUserID(
         parsed_command_line().GetSwitchValueASCII(switches::kLoginUser));
     user_manager::UserManager* user_manager = user_manager::UserManager::Get();
 
-    if (policy::IsDeviceLocalAccountUser(user_id, NULL) &&
-        !user_manager->IsKnownUser(user_id)) {
+    const AccountId account_id(AccountId::FromUserEmail(user_email));
+    if (policy::IsDeviceLocalAccountUser(account_id.GetUserEmail(), NULL) &&
+        !user_manager->IsKnownUser(account_id)) {
       // When a device-local account is removed, its policy is deleted from disk
       // immediately. If a session using this account happens to be in progress,
       // the session is allowed to continue with policy served from an in-memory
       // cache. If Chrome crashes later in the session, the policy becomes
       // completely unavailable. Exit the session in that case, rather than
       // allowing it to continue without policy.
       chrome::AttemptUserExit();
       return;
     }
 
     // In case of multi-profiles --login-profile will contain user_id_hash.
     std::string user_id_hash =
         parsed_command_line().GetSwitchValueASCII(switches::kLoginProfile);
-    user_manager->UserLoggedIn(user_id, user_id_hash, true);
-    VLOG(1) << "Relaunching browser for user: " << user_id
+    user_manager->UserLoggedIn(account_id, user_id_hash, true);
+    VLOG(1) << "Relaunching browser for user: " << user_email
             << " with hash: " << user_id_hash;
   }
 }
 
 class GuestLanguageSetCallbackData {
  public:
   explicit GuestLanguageSetCallbackData(Profile* profile) : profile(profile) {
   }
 
   // Must match SwitchLanguageCallback type.
@@ skipping 286 matching lines @@
   // Destroy DBus services immediately after threads are stopped.
   dbus_services_.reset();
 
   ChromeBrowserMainPartsLinux::PostDestroyThreads();
 
   // Destroy DeviceSettingsService after g_browser_process.
   DeviceSettingsService::Shutdown();
 }
 
 }  //  namespace chromeos