ash: Fix event processing in modal windows in login/lock screen.

ash/root_window_controller_unittest.cc

Index: ash/root_window_controller_unittest.cc
diff --git a/ash/root_window_controller_unittest.cc b/ash/root_window_controller_unittest.cc
index 67842f0f531d1e74d584bd21b986acf22f025d8b..67adc4a0589a6594fa533a89620161918e1f3ca6 100644
--- a/ash/root_window_controller_unittest.cc
+++ b/ash/root_window_controller_unittest.cc
@@ -2,11 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "ash/root_window_controller.h"
+
 #include "ash/display/display_controller.h"
 #include "ash/display/multi_display_manager.h"
 #include "ash/shell.h"
+#include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
+#include "ash/system/tray/system_tray_delegate.h"
 #include "ash/test/ash_test_base.h"
+#include "ash/wm/system_modal_container_layout_manager.h"
 #include "ash/wm/window_util.h"
 #include "ui/aura/env.h"
 #include "ui/aura/focus_manager.h"
@@ -210,5 +215,25 @@ TEST_F(RootWindowControllerTest, MoveWindows_Modal) {
   EXPECT_TRUE(wm::IsActiveWindow(modal->GetNativeView()));
 }
 
+TEST_F(RootWindowControllerTest, ModalContainer) {
+  UpdateDisplay("600x600");
+  Shell* shell = Shell::GetInstance();
+  internal::RootWindowController* controller =
+      shell->GetPrimaryRootWindowController();
+  EXPECT_EQ(user::LOGGED_IN_USER,
+            shell->tray_delegate()->GetUserLoginStatus());
+  EXPECT_EQ(Shell::GetContainer(controller->root_window(),
+      internal::kShellWindowId_SystemModalContainer)->layout_manager(),
+          controller->GetSystemModalLayoutManager(NULL));
+
+  shell->delegate()->LockScreen();
+  EXPECT_EQ(user::LOGGED_IN_LOCKED,
+            shell->tray_delegate()->GetUserLoginStatus());
+  EXPECT_EQ(Shell::GetContainer(controller->root_window(),
+      internal::kShellWindowId_LockSystemModalContainer)->layout_manager(),
+          controller->GetSystemModalLayoutManager(NULL));
+  shell->delegate()->UnlockScreen();
+}
+
 }  // namespace test
 }  // namespace ash