Managed user creation flow:

chrome/browser/chromeos/login/managed/locally_managed_user_creation_screen.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_MANAGED_LOCALLY_MANAGED_USER_CREATION_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_MANAGED_LOCALLY_MANAGED_USER_CREATION_SCREEN_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/chromeos/login/managed/locally_managed_user_controller.h"
 #include "chrome/browser/chromeos/login/wizard_screen.h"
+#include "chrome/browser/chromeos/net/connectivity_state_helper_observer.h"
 #include "chrome/browser/ui/webui/chromeos/login/locally_managed_user_creation_screen_handler.h"
 
 namespace chromeos {
 
 // Class that controls screen showing ui for locally managed user creation.
 class LocallyManagedUserCreationScreen
     : public WizardScreen,
       public LocallyManagedUserCreationScreenHandler::Delegate,
-      public LocallyManagedUserController::StatusConsumer {
+      public LocallyManagedUserController::StatusConsumer,
+      public ConnectivityStateHelperObserver {
  public:
   LocallyManagedUserCreationScreen(
       ScreenObserver* observer,
       LocallyManagedUserCreationScreenHandler* actor);
   virtual ~LocallyManagedUserCreationScreen();
 
   // Makes screen to show message about inconsistency in manager login flow
   // (e.g. password change detected, invalid OAuth token, etc).
   // Called when manager user is successfully authenticated, so ui elements
   // should result in forced logout.
@@ skipping 28 matching lines @@
                        std::string& manager_password) OVERRIDE;
   virtual void AbortFlow() OVERRIDE;
   virtual void RetryLastStep() OVERRIDE;
   virtual void FinishFlow() OVERRIDE;
 
   // LocallyManagedUserController::StatusConsumer overrides.
   virtual void OnCreationError(LocallyManagedUserController::ErrorCode code,
                                bool recoverable) OVERRIDE;
   virtual void OnCreationSuccess() OVERRIDE;
 
+  // ConnectivityStateHelperObserver implementation:
+  virtual void NetworkManagerChanged() OVERRIDE;
+
  private:
+

[Nikita (slow), 2013/04/03 17:25:41]

nit: drop empty line

   LocallyManagedUserCreationScreenHandler* actor_;
 
   scoped_ptr<LocallyManagedUserController> controller_;
 
+  bool on_error_screen_;
+
   DISALLOW_COPY_AND_ASSIGN(LocallyManagedUserCreationScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_MANAGED_LOCALLY_MANAGED_USER_CREATION_SCREEN_H_