Fix flashing pod.

chrome/browser/chromeos/login/existing_user_controller.cc

 // Copyright (c) 2012 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/login/existing_user_controller.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 704 matching lines @@
     // Wait for login attempt to end, if it hasn't yet.
     if (offline_failed_ && !is_login_in_progress_)
       ShowGaiaPasswordChanged(username);
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ExistingUserController, private:
 
 void ExistingUserController::DeviceSettingsChanged() {
-  if (host_ != NULL) {
+  // If login was already completed, we should avoid any signin screen
+  // transitions, see http://crbug.com/461604 for example.
+  if (host_ != NULL && !login_display_->is_signin_completed()) {
     // Signed settings or user list changed. Notify views and update them.
     UpdateLoginDisplay(user_manager::UserManager::Get()->GetUsers());
     ConfigurePublicSessionAutoLogin();
-    return;
   }
 }
 
 LoginPerformer::AuthorizationMode ExistingUserController::auth_mode() const {
   if (login_performer_)
     return login_performer_->auth_mode();
 
   return auth_mode_;
 }
 
@@ skipping 419 matching lines @@
     login_display_->SetUIEnabled(true);
     // Restart the auto-login timer.
     StartPublicSessionAutoLoginTimer();
   }
 
   PerformPreLoginActions(user_context);
   PerformLogin(user_context, LoginPerformer::AUTH_MODE_INTERNAL);
 }
 
 }  // namespace chromeos