Modal window in user session not blocks user adding screen.

ash/wm/system_modal_container_layout_manager.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 "ash/wm/system_modal_container_layout_manager.h"
 
 #include "ash/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/system_modal_container_event_filter.h"
@@ skipping 48 matching lines @@
   }
 }
 
 void SystemModalContainerLayoutManager::OnWindowAddedToLayout(
     aura::Window* child) {
   DCHECK((modal_background_ && child == modal_background_->GetNativeView()) ||
          child->type() == aura::client::WINDOW_TYPE_NORMAL ||
          child->type() == aura::client::WINDOW_TYPE_POPUP);
   DCHECK(
       container_->id() != internal::kShellWindowId_LockSystemModalContainer ||
-      Shell::GetInstance()->session_state_delegate()->IsScreenLocked() ||
-      !Shell::GetInstance()->session_state_delegate()->
-          IsActiveUserSessionStarted());
+      Shell::GetInstance()->session_state_delegate()->IsUserSessionBlocked());
 
   child->AddObserver(this);
   if (child->GetProperty(aura::client::kModalKey) != ui::MODAL_TYPE_NONE)
     AddModalWindow(child);
 }
 
 void SystemModalContainerLayoutManager::OnWillRemoveWindowFromLayout(
     aura::Window* child) {
   child->RemoveObserver(this);
   if (child->GetProperty(aura::client::kModalKey) != ui::MODAL_TYPE_NONE)
@@ skipping 32 matching lines @@
     Shell::GetInstance()->OnModalWindowRemoved(window);
   }
 }
 
 void SystemModalContainerLayoutManager::OnWindowDestroying(
     aura::Window* window) {
   if (modal_background_ && modal_background_->GetNativeView() == window)
     modal_background_ = NULL;
 }
 
-
-////////////////////////////////////////////////////////////////////////////////
-// SystemModalContainerLayoutManager,
-//     SystemModalContainerEventFilter::Delegate implementation:
-
 bool SystemModalContainerLayoutManager::CanWindowReceiveEvents(
     aura::Window* window) {
   // We could get when we're at lock screen and there is modal window at
   // system modal window layer which added event filter.
   // Now this lock modal windows layer layout manager should not block events
   // for windows at lock layer.
   // See SystemModalContainerLayoutManagerTest.EventFocusContainers and
   // http://crbug.com/157469
   if (modal_windows_.empty())
     return true;
   // This container can not handle events if the screen is locked and it is not
   // above the lock screen layer (crbug.com/110920).
-  if (Shell::GetInstance()->session_state_delegate()->IsScreenLocked() &&
+  if (Shell::GetInstance()->session_state_delegate()->IsUserSessionBlocked() &&
       container_->id() < ash::internal::kShellWindowId_LockScreenContainer)
     return true;
   return wm::GetActivatableWindow(window) == modal_window();
 }
 
 bool SystemModalContainerLayoutManager::ActivateNextModalWindow() {
   if (modal_windows_.empty())
     return false;
   wm::ActivateWindow(modal_window());
   return true;
@@ skipping 70 matching lines @@
 void SystemModalContainerLayoutManager::RemoveModalWindow(
     aura::Window* window) {
   aura::Window::Windows::iterator it =
       std::find(modal_windows_.begin(), modal_windows_.end(), window);
   if (it != modal_windows_.end())
     modal_windows_.erase(it);
 }
 
 }  // namespace internal
 }  // namespace ash