mash: Convert system tray logout button to wm common types

ash/common/system/chromeos/session/logout_confirmation_dialog.cc

Index: ash/common/system/chromeos/session/logout_confirmation_dialog.cc
diff --git a/ash/system/chromeos/session/logout_confirmation_dialog.cc b/ash/common/system/chromeos/session/logout_confirmation_dialog.cc
similarity index 81%
rename from ash/system/chromeos/session/logout_confirmation_dialog.cc
rename to ash/common/system/chromeos/session/logout_confirmation_dialog.cc
index 3464639a33fc6b2741c5a0a650a95d6c02c081c1..a95a57ee1fb5c34cdbfddf6cfd78622b64753c00 100644
--- a/ash/system/chromeos/session/logout_confirmation_dialog.cc
+++ b/ash/common/system/chromeos/session/logout_confirmation_dialog.cc
@@ -2,17 +2,21 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ash/system/chromeos/session/logout_confirmation_dialog.h"
+#include "ash/common/system/chromeos/session/logout_confirmation_dialog.h"
 
+#include "ash/common/shell_window_ids.h"
+#include "ash/common/system/chromeos/session/logout_confirmation_controller.h"
 #include "ash/common/system/tray/tray_constants.h"
-#include "ash/shell.h"
-#include "ash/system/chromeos/session/logout_confirmation_controller.h"
+#include "ash/common/wm_root_window_controller.h"
+#include "ash/common/wm_shell.h"
+#include "ash/common/wm_window.h"
 #include "base/location.h"
 #include "base/time/tick_clock.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/time_format.h"
 #include "ui/base/ui_base_types.h"
+#include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/text_constants.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/label.h"
@@ -43,8 +47,16 @@ LogoutConfirmationDialog::LogoutConfirmationDialog(
 
   UpdateLabel();
 
-  CreateDialogWidget(this, ash::Shell::GetPrimaryRootWindow(), NULL);
-  GetWidget()->Show();
+  views::Widget* widget = new views::Widget;
+  views::Widget::InitParams params =
+      GetDialogWidgetInitParams(this, nullptr, nullptr, gfx::Rect());
+  WmShell::Get()
+      ->GetPrimaryRootWindow()
+      ->GetRootWindowController()
+      ->ConfigureWidgetInitParamsForContainer(
+          widget, kShellWindowId_SystemModalContainer, &params);
+  widget->Init(params);
+  widget->Show();
 
   update_timer_.Start(
       FROM_HERE, base::TimeDelta::FromMilliseconds(kCountdownUpdateIntervalMs),