Make idle logout window not cause the app list to disappear.

chrome/browser/chromeos/ui/idle_logout_dialog_view.cc

Index: chrome/browser/chromeos/ui/idle_logout_dialog_view.cc
diff --git a/chrome/browser/chromeos/ui/idle_logout_dialog_view.cc b/chrome/browser/chromeos/ui/idle_logout_dialog_view.cc
index 1186192ef287334b390ce1b1c0c82fd3ec5f9b51..eceea4d7c886701d3870f942a4eb7bd6f6c486d8 100644
--- a/chrome/browser/chromeos/ui/idle_logout_dialog_view.cc
+++ b/chrome/browser/chromeos/ui/idle_logout_dialog_view.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/chromeos/ui/idle_logout_dialog_view.h"
 
+#include "ash/shell.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/time.h"
@@ -170,8 +171,15 @@ void IdleLogoutDialogView::Show() {
 
   UpdateCountdown();
 
-  views::Widget::CreateWindow(this);
-  GetWidget()->SetAlwaysOnTop(true);
+  // If the apps list is displayed, we should show as it's child. Not doing
+  // so will cause the apps list to disappear.
+  gfx::NativeWindow app_list = ash::Shell::GetInstance()->GetAppListWindow();
+  if (app_list) {
+    views::Widget::CreateWindowWithParent(this, app_list);
+  } else {
+    views::Widget::CreateWindow(this);
+    GetWidget()->SetAlwaysOnTop(true);
+  }
   GetWidget()->Show();
 
   // Update countdown every 1 second.