Managed user creation flow:

chrome/browser/chromeos/login/managed/locally_managed_user_creation_screen.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/login/managed/locally_managed_user_creation_screen.h"
 
+#include "chrome/browser/chromeos/login/error_screen.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
 #include "chrome/browser/chromeos/login/managed/locally_managed_user_controller.h"
 #include "chrome/browser/chromeos/login/screen_observer.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
+#include "chrome/browser/chromeos/net/connectivity_state_helper.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
+

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

nit: drop empty line

 namespace chromeos {
 
 LocallyManagedUserCreationScreen::LocallyManagedUserCreationScreen(
     ScreenObserver* observer,
     LocallyManagedUserCreationScreenHandler* actor)
-    : WizardScreen(observer), actor_(actor) {
+    : WizardScreen(observer),
+      actor_(actor),
+      on_error_screen_(false) {
   DCHECK(actor_);
   if (actor_)
     actor_->SetDelegate(this);
 }
 
 LocallyManagedUserCreationScreen::~LocallyManagedUserCreationScreen() {
   if (actor_)
     actor_->SetDelegate(NULL);
 }
 
 void LocallyManagedUserCreationScreen::PrepareToShow() {
   if (actor_)
     actor_->PrepareToShow();
 }
 
 void LocallyManagedUserCreationScreen::Show() {
   if (actor_) {
     actor_->Show();
     actor_->ShowInitialScreen();
   }
+  ConnectivityStateHelper* helper = ConnectivityStateHelper::Get();
+  if (helper && !on_error_screen_) {
+    helper->AddNetworkManagerObserver(this);
+    NetworkManagerChanged();
+  }
+  on_error_screen_ = false;
 }
 
+void LocallyManagedUserCreationScreen::NetworkManagerChanged() {
+  ConnectivityStateHelper* helper = ConnectivityStateHelper::Get();
+  if (!helper)
+    return;
+  if (helper->IsConnected()) {
+    // hide error screen

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

nit: drop comment

+    get_screen_observer()->HideErrorScreen(this);
+  } else {
+    // show error screen

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

nit: drop comment

+    on_error_screen_ = true;
+    get_screen_observer()->
+        GetErrorScreen()->SetUIState(ErrorScreen::UI_STATE_MANAGED);
+    get_screen_observer()->ShowErrorScreen();

[ygorshenin1, 2013/04/03 17:33:32]

What is the error state for the error screen?

+  }
+}
+
+

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

nit: drop empty line

 void LocallyManagedUserCreationScreen::
     ShowManagerInconsistentStateErrorScreen() {
   if (!actor_)
     return;
   actor_->ShowErrorMessage(
       l10n_util::GetStringUTF16(
           IDS_CREATE_LOCALLY_MANAGED_USER_MANAGER_INCONSISTENT_STATE),
       false);
 }
 
 void LocallyManagedUserCreationScreen::ShowInitialScreen() {
   if (actor_)
     actor_->ShowInitialScreen();
 }
 
 
 void LocallyManagedUserCreationScreen::Hide() {
   if (actor_)
     actor_->Hide();
+  ConnectivityStateHelper* helper = ConnectivityStateHelper::Get();
+  if (helper && !on_error_screen_)
+    helper->RemoveNetworkManagerObserver(this);
 }
 
 std::string LocallyManagedUserCreationScreen::GetName() const {
   return WizardController::kLocallyManagedUserCreationScreenName;
 }
 
 void LocallyManagedUserCreationScreen::AbortFlow() {
   controller_->FinishCreation();
 }
 
@@ skipping 72 matching lines @@
   if (actor_)
     actor_->ShowErrorMessage(message, recoverable);
 }
 
 void LocallyManagedUserCreationScreen::OnCreationSuccess() {
   if (actor_)
     actor_->ShowSuccessMessage();
 }
 
 }  // namespace chromeos