Network connectivity errors handling (incl. CP) for enrollment flow

chrome/browser/chromeos/login/ui/login_display_host_impl.cc

 // Copyright 2014 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/ui/login_display_host_impl.h"
 
 #include <vector>
 
 #include "ash/audio/sounds.h"
 #include "ash/desktop_background/desktop_background_controller.h"
@@ skipping 393 matching lines @@
   CrasAudioHandler::Get()->RemoveAudioObserver(this);
   if (keyboard::KeyboardController::GetInstance() && is_observing_keyboard_) {
     keyboard::KeyboardController::GetInstance()->RemoveObserver(this);
     is_observing_keyboard_ = false;
   }
 
   ash::Shell::GetInstance()->delegate()->
       RemoveVirtualKeyboardStateObserver(this);
   ash::Shell::GetScreen()->RemoveObserver(this);
 
+  if (login_view_ && login_window_)
+    login_window_->RemoveRemovalsObserver(this);
+
   if (login::LoginScrollIntoViewEnabled())
     ResetKeyboardOverscrollOverride();
 
   views::FocusManager::set_arrow_key_traversal_enabled(false);
   ResetLoginWindowAndView();
 
   // Let chrome process exit after login/oobe screen if needed.
   chrome::DecrementKeepAliveCount();
 
   default_host_ = NULL;
@@ skipping 474 matching lines @@
   }
 
   if (GetOobeUI()) {
     const gfx::Size& size = ash::Shell::GetScreen()->GetPrimaryDisplay().size();
     GetOobeUI()->GetCoreOobeActor()->SetClientAreaSize(size.width(),
                                                        size.height());
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// LoginDisplayHostImpl, views::WidgetRemovalsObserver implementation:
+void LoginDisplayHostImpl::OnWillRemoveView(views::Widget* widget,
+                                            views::View* view) {
+  if (view != static_cast<views::View*>(login_view_))
+    return;
+  login_view_ = NULL;
+  widget->RemoveRemovalsObserver(this);
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // LoginDisplayHostImpl, private
 
 void LoginDisplayHostImpl::ShutdownDisplayHost(bool post_quit_task) {
   if (shutting_down_)
     return;
 
   shutting_down_ = true;
   registrar_.RemoveAll();
   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
   if (post_quit_task)
@@ skipping 137 matching lines @@
   if (login_view_->webui_visible())
     OnLoginPromptVisible();
 
   wm::SetWindowVisibilityAnimationDuration(
       login_window_->GetNativeView(),
       base::TimeDelta::FromMilliseconds(kLoginFadeoutTransitionDurationMs));
   wm::SetWindowVisibilityAnimationTransition(
       login_window_->GetNativeView(),
       wm::ANIMATE_HIDE);
 
+  login_window_->AddRemovalsObserver(this);
   login_window_->SetContentsView(login_view_);
 
   // If WebUI is initialized in hidden state, show it only if we're no
   // longer waiting for wallpaper animation/user images loading. Otherwise,
   // always show it.
   if (!initialize_webui_hidden_ ||
       (!waiting_for_wallpaper_load_ && !waiting_for_user_pods_)) {
     LOG(WARNING) << "Login WebUI >> show login wnd on create";
     login_window_->Show();
   } else {
@@ skipping 186 matching lines @@
   scoped_ptr<locale_util::SwitchLanguageCallback> callback(
       new locale_util::SwitchLanguageCallback(
           base::Bind(&OnLanguageSwitchedCallback, base::Passed(data.Pass()))));
 
   // Load locale keyboards here. Hardware layout would be automatically enabled.
   locale_util::SwitchLanguage(
       locale, true, true /* login_layouts_only */, callback.Pass());
 }
 
 }  // namespace chromeos